Display panel, display device, input/output device, and data processing device

ABSTRACT

A novel display panel that is highly convenient or reliable is provided. The display panel includes a first pixel; the first pixel includes a first display element, a first color conversion layer, and a first absorption layer; the first display element emits first light; the first absorption layer overlaps with the first display element; and the first absorption layer absorbs the first light. Furthermore, the first color conversion layer is sandwiched between the first display element and the first absorption layer; the first color conversion layer converts the first light into second light; and the second light has a spectrum including a high proportion of light with a long wavelength compared with the first light.

This application is a 371 of international application PCT/IB2019/054423filed on May 29, 2019 which is incorporated herein by reference.

TECHNICAL FIELD

One embodiment of the present invention relates to a display panel, adisplay device, an input/output device, or a data processing device.

Note that one embodiment of the present invention is not limited to theabove technical field. The technical field of one embodiment of theinvention disclosed in this specification and the like relates to anobject, a method, or a manufacturing method. One embodiment of thepresent invention relates to a process, a machine, manufacture, or acomposition of matter. Thus, more specifically, examples of thetechnical field of one embodiment of the present invention disclosed inthis specification include a semiconductor device, a display device, alight-emitting device, a power storage device, a memory device, adriving method thereof, and a manufacturing method thereof.

BACKGROUND ART

There is known a light-emitting device including a first light-emittingelement, a second light-emitting element, and a third light-emittingelement; the first light-emitting element, the second light-emittingelement, and the third light-emitting element include a common EL layer;the EL layer includes a layer containing a light-emitting materialemitting blue fluorescence and a layer containing a light-emittingmaterial emitting yellow or green phosphorescence; light emitted fromthe second light-emitting element enters a color filter layer or asecond color conversion layer; and light emitted from the thirdlight-emitting element enters a first color conversion layer (PatentDocument 1).

REFERENCE Patent Document

[Patent Document 1] Japanese Published Patent Application No. 2016-6768

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

An object of one embodiment of the present invention is to provide anovel display panel that is highly convenient or reliable.Alternatively, an object is to provide a novel display device that ishighly convenient or reliable. Alternatively, an object is to provide anovel input/output device that is highly convenient or reliable.Alternatively, an object is to provide a novel data processing devicethat is highly convenient or reliable. Alternatively, an object is toprovide a novel display panel, a novel display device, a novelinput/output device, a novel data processing device, or a novelsemiconductor device.

Note that the descriptions of these objects do not disturb the existenceof other objects. One embodiment of the present invention does not haveto achieve all these objects. Objects other than these will be apparentfrom the descriptions of the specification, the drawings, the claims,and the like, and objects other than these can be derived from thedescriptions of the specification, the drawings, the claims, and thelike.

Means for Solving the Problems

(1) One embodiment of the present invention is a display panel includinga display region. The display region includes a first pixel, and thefirst pixel includes a first display element, a first color conversionlayer, and a first absorption layer.

The first display element emits first light.

The first absorption layer overlaps with the first display element, andthe first absorption layer absorbs the first light.

The first color conversion layer is sandwiched between the firstabsorption layer and the first display element, and the first colorconversion layer converts the first light into second light. Note thatthe second light has a spectrum including a high proportion of lightwith a long wavelength compared with the first light.

Accordingly, the first light emitted from the first display element canbe converted into the second light. Alternatively, the first lightincluded in external light can be weakened before reaching the firstcolor conversion layer. Alternatively, a phenomenon in which the firstlight included in external light is converted into the second light canbe inhibited. Alternatively, a phenomenon in which black display isimpaired by external light can be inhibited. Alternatively, display canbe performed with high contrast. As a result, a novel display panel thatis highly convenient or reliable can be provided.

(2) One embodiment of the present invention is the above display panelin which the first absorption layer absorbs the first light and thirdlight. Note that the third light has a spectrum including a highproportion of light with a long wavelength compared with the secondlight.

Thus, the third light can be absorbed. Alternatively, a phenomenon inwhich black display is impaired by external light can be inhibited.Alternatively, display can be performed with high contrast. As a result,a novel display panel that is highly convenient or reliable can beprovided.

(3) One embodiment of the present invention is the above display panelin which the first color conversion layer converts the first light intothe second light and the third light.

Accordingly, the first light emitted from the first display element canbe converted into the second light and the third light. Alternatively,the converted third light can be absorbed. Alternatively, a phenomenonin which the first light included in external light is converted intothe second light and the third light can be inhibited. Alternatively, aphenomenon in which vivid display using the second light is impaired bythe third light can be inhibited. As a result, a novel display panelthat is highly convenient or reliable can be provided.

(4) One embodiment of the present invention is the above display panelin which the display region includes a second pixel. The second pixelincludes a second display element, a second color conversion layer, anda second absorption layer.

The second display element emits the first light.

The second absorption layer overlaps with the second display element,and the second absorption layer absorbs the first light.

The second color conversion layer is sandwiched between the secondabsorption layer and the second display element, and the second colorconversion layer converts the first light into the third light.

Thus, the first light emitted from the second display element can beconverted into the third light. Alternatively, the first light includedin external light can be weakened before reaching the second colorconversion layer. Alternatively, a phenomenon in which the first lightincluded in external light is converted into the third light can beinhibited. Alternatively, a phenomenon in which black display isimpaired by external light can be inhibited. Alternatively, display canbe performed with high contrast. Alternatively, the second displayelement can be formed through the same process as that for forming thefirst display element. As a result, a novel display panel that is highlyconvenient or reliable can be provided.

(5) One embodiment of the present invention is the above display panelin which the second absorption layer absorbs the first light and thesecond light.

Accordingly, the second light can be absorbed. Alternatively, aphenomenon in which black display is impaired by external light can beinhibited. Alternatively, display can be performed with high contrast.As a result, a novel display panel that is highly convenient or reliablecan be provided.

(6) One embodiment of the present invention is the above display panelin which the second color conversion layer converts the first light intothe second light and the third light.

Thus, the first light emitted from the second display element can beconverted into the second light and the third light. Alternatively, theconverted second light can be absorbed. Alternatively, a phenomenon inwhich the first light included in external light is converted into thesecond light and the third light can be inhibited. Alternatively, aphenomenon in which vivid display using the third light is impaired bythe second light can be inhibited. As a result, a novel display panelthat is highly convenient or reliable can be provided.

(7) One embodiment of the present invention is the above display panelin which the display region includes a third pixel. The third pixelincludes a third display element, and the third display element emitsthe first light.

Thus, display can be performed using the first light, the second light,and the third light. Alternatively, full color display can be performedusing only the display elements emitting the first light. Alternatively,the second display element and the third display element can be formedthrough the same process as that for forming the first display element.As a result, a novel display panel that is highly convenient or reliablecan be provided.

(8) One embodiment of the present invention is the above display panelin which the third pixel includes a third color conversion layer and athird absorption layer.

The third absorption layer overlaps with the third display element, andthe third absorption layer absorbs the second light and the third light.

The first color conversion layer converts the first light into thesecond light, the third light, and fourth light, and the second colorconversion layer converts the first light into the second light, thethird light, and the fourth light.

The third color conversion layer is sandwiched between the thirdabsorption layer and the third display element, and the third colorconversion layer converts the first light into the second light, thethird light, and the fourth light.

The fourth light has a spectrum including a high proportion of lightwith a short wavelength compared with the second light.

Accordingly, the first light emitted from the third display element canbe converted into the second light, the third light, and the fourthlight. Alternatively, the converted second light and third light can beabsorbed. Alternatively, a phenomenon in which vivid display using thefourth light is impaired by the second light and the third light can beinhibited. Alternatively, the same structure as that of the first colorconversion layer can be used for the second color conversion layer andthe third color conversion layer. As a result, a novel display panelthat is highly convenient or reliable can be provided.

(9) One embodiment of the prevent invention is the above display panelin which the first pixel emits light of a color that has a chromaticityx of greater than or equal to 0.130 and less than or equal to 0.250 anda chromaticity y of greater than 0.710 and less than or equal to 0.810in the CIE 1931 chromaticity coordinates, the second pixel emits lightof a color that has a chromaticity x of greater than 0.680 and less thanor equal to 0.720 and a chromaticity y of greater than or equal to 0.260and less than or equal to 0.320 in the CIE 1931 chromaticitycoordinates, and the third pixel emits light of a color that has achromaticity x of greater than or equal to 0.120 and less than or equalto 0.170 and a chromaticity y of greater than or equal to 0.020 and lessthan 0.060 in the CIE 1931 chromaticity coordinates.

Thus, a vivid image can be displayed. As a result, a novel display panelthat is highly convenient or reliable can be provided.

(10) One embodiment of the present invention is the above display panelin which the display region includes a group of pixels, a differentgroup of pixels, a scan line, and a signal line.

The group of pixels is arranged in a row direction, and the group ofpixels includes the first pixel.

The different group of pixels is arranged in a column directionintersecting the row direction, and the different group of pixelsincludes the first pixel.

The scan line is electrically connected to the group of pixels, and thesignal line is electrically connected to the different group of pixels.

Thus, image data can be supplied to a plurality of pixels. As a result,a novel display panel that is highly convenient or reliable can beprovided.

(11) One embodiment of the present invention is the display panel inwhich the display region includes a plurality of pixels in a matrix. Thedisplay region includes 7600 or more pixels in the row direction, andthe display region includes 4300 or more pixels in the column direction.

(12) One embodiment of the present invention is the above display panelin which a diagonal of the display region is greater than or equal to 40inches.

Thus, a high-resolution image can be displayed. Alternatively, arealistic image can be displayed. As a result, a novel display panelthat is highly convenient or reliable can be provided.

(13) One embodiment of the present invention is a display deviceincluding the above display panel and a control portion.

The control portion is supplied with image data and control data. Thecontrol portion generates data on the basis of the image data, and thecontrol portion generates a control signal on the basis of the controldata. The control portion supplies the data and the control signal.

The display panel is supplied with the data and the control signal, andthe pixel performs display on the basis of the data.

Thus, the image data can be displayed using the display element. As aresult, a novel display device that is highly convenient or reliable canbe provided.

(14) One embodiment of the present invention is an input/output deviceincluding an input portion and a display portion.

The display portion includes the above display panel.

The input portion includes a sensing region, and the input portionsenses an object approaching the sensing region. Furthermore, thesensing region includes a region overlapping with the pixel.

Thus, the object approaching the region overlapping with the displayportion can be sensed while image data is displayed using the displayportion. Alternatively, a finger or the like that approaches the displayportion can be used as a pointer to input positional data.Alternatively, positional data can be associated with image datadisplayed on the display portion. As a result, a novel input/outputdevice that is highly convenient or reliable can be provided.

(15) One embodiment of the present invention is a data processing deviceincluding an arithmetic device and an input/output device.

The arithmetic device is supplied with input data or sensing data. Thearithmetic device generates control data and image data on the basis ofthe input data or the sensing data, and the arithmetic device suppliesthe control data and the image data.

The input/output device supplies the input data and the sensing data,and the input/output device is supplied with the control data and theimage data. The input/output device includes a display portion, an inputportion, and a sensing portion.

The display portion includes the above display panel, and the displayportion displays the image data on the basis of the control data.

The input portion generates the input data, and the sensing portiongenerates the sensing data.

Thus, the control data can be generated on the basis of the input dataor the sensing data. Alternatively, the image data can be displayed onthe basis of the input data or the sensing data. As a result, a noveldata processing device that is highly convenient or reliable can beprovided.

(16) One embodiment of the present invention is a data processing deviceincluding one or more of a keyboard, a hardware button, a pointingdevice, a touch sensor, an illuminance sensor, an imaging device, anaudio input device, an eye-gaze input device, and an attitude detectiondevice, and the above display panel.

Thus, an arithmetic device can generate image data or control data onthe basis of data supplied using a variety of input devices. As aresult, a novel data processing device that is highly convenient orreliable can be provided.

In this specification, in the case where a substance A is dispersed in amatrix formed with a substance B, the substance B forming the matrix isreferred to as a host material, and the substance A dispersed in thematrix is referred to as a guest material. Note that the substance A andthe substance B may each be a single substance or a mixture of two ormore kinds of substances.

Although the block diagram in which components are classified by theirfunctions and shown as independent blocks is shown in the drawingsattached to this specification, it is difficult to completely separateactual components according to their functions and one component canrelate to a plurality of functions.

In this specification, the names of a source and a drain of a transistorinterchange with each other depending on the polarity of the transistorand the levels of potentials applied to the terminals. In general, in ann-channel transistor, a terminal to which a lower potential is appliedis called a source, and a terminal to which a higher potential isapplied is called a drain. In a p-channel transistor, a terminal towhich a lower potential is applied is called a drain, and a terminal towhich a higher potential is applied is called a source. In thisspecification, for the sake of convenience, the connection relation of atransistor is sometimes described assuming that the source and the drainare fixed; in reality, the names of the source and the drain interchangewith each other according to the above relation of the potentials.

In this specification, a source of a transistor means a source regionthat is part of a semiconductor film functioning as an active layer or asource electrode connected to the above semiconductor film. Similarly, adrain of a transistor means a drain region that is part of the abovesemiconductor film or a drain electrode connected to the abovesemiconductor film. Moreover, a gate means a gate electrode.

In this specification, a state in which transistors are connected inseries means, for example, a state in which only one of a source and adrain of a first transistor is connected to only one of a source and adrain of a second transistor. In addition, a state in which transistorsare connected in parallel means a state in which one of a source and adrain of a first transistor is connected to one of a source and a drainof a second transistor and the other of the source and the drain of thefirst transistor is connected to the other of the source and the drainof the second transistor.

In this specification, connection means electrical connection andcorresponds to a state in which a current, a voltage, or a potential canbe supplied or transmitted. Accordingly, a state of being connected doesnot necessarily mean a state of being directly connected and alsoincludes, in its category, a state of being indirectly connected througha circuit element such as a wiring, a resistor, a diode, or a transistorthat allows a current, a voltage, or a potential to be supplied ortransmitted.

In this specification, even when independent components are connected toeach other in a circuit diagram, there is actually a case where oneconductive film has functions of a plurality of components, such as acase where part of a wiring functions as an electrode, for example.Connection in this specification also includes such a case where oneconductive film has functions of a plurality of components, in itscategory.

Furthermore, in this specification, one of a first electrode and asecond electrode of a transistor refers to a source electrode and theother refers to a drain electrode.

Effect of the Invention

According to one embodiment of the present invention, a novel displaypanel that is highly convenient or reliable can be provided.Alternatively, a novel display device that is highly convenient orreliable can be provided. Alternatively, a novel input/output devicethat is highly convenient or reliable can be provided. Alternatively, anovel data processing device that is highly convenient or reliable canbe provided. Alternatively, a novel display panel, a novel displaydevice, a novel input/output device, a novel data processing device, ora novel semiconductor device can be provided.

Note that the descriptions of these effects do not disturb the existenceof other effects. One embodiment of the present invention does not needto have all these effects. Effects other than these will be apparentfrom the descriptions of the specification, the drawings, the claims,and the like, and effects other than these can be derived from thedescriptions of the specification, the drawings, the claims, and thelike.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 (A) to (C) Diagrams illustrating structures of pixels of adisplay panel of an embodiment and emission spectra and an absorptionspectrum of an absorption layer.

FIG. 2 (A) to (C) Diagrams each illustrating emission spectra of adisplay panel of an embodiment and an absorption spectrum of anabsorption layer.

FIG. 3 (A) to (C) Top views illustrating a structure of a display panelof an embodiment.

FIGS. 4 (A) and (B) A cross-sectional view and a circuit diagramillustrating a structure of a display panel of an embodiment.

FIGS. 5 (A) and (B) Cross-sectional views illustrating a structure of adisplay panel of an embodiment.

FIGS. 6 (A) and (B) Cross-sectional views illustrating a structure of adisplay panel of an embodiment.

FIG. 7 A block diagram illustrating a structure of a display panel of anembodiment.

FIGS. 8 (A) and (B-1) to (B-3) Diagrams illustrating a structure of adisplay device of an embodiment.

FIG. 9 A block diagram illustrating a structure of an input/outputdevice of an embodiment.

FIG. 10 (A) to (C) A block diagram and projection views illustrating astructure of a data processing device of an embodiment.

FIGS. 11 (A) and (B) Flow charts illustrating a method for driving adata processing device of an embodiment.

FIG. 12 (A) to (C) Diagrams illustrating a method for driving a dataprocessing device of an embodiment.

FIG. 13 (A) to (E) Diagrams each illustrating a structure of a dataprocessing device of an embodiment.

FIG. 14 (A) to (E) Diagrams each illustrating a structure of a dataprocessing device of an embodiment.

MODE FOR CARRYING OUT THE INVENTION

One embodiment of the present invention is a display panel including adisplay region. The display region includes a first pixel, and the firstpixel includes a first display element, a first color conversion layer,and a first absorption layer. The first display element emits firstlight, the first absorption layer overlaps with the first displayelement, and the first absorption layer absorbs the first light. Thefirst color conversion layer is sandwiched between the first absorptionlayer and the first display element, the first color conversion layerconverts the first light into second light, and the second light has aspectrum including a high proportion of light with a long wavelengthcompared with the first light.

Accordingly, the first light emitted from the first display element canbe converted into the second light. Alternatively, the first lightincluded in external light can be weakened before reaching the firstcolor conversion layer. Alternatively, a phenomenon in which the firstlight included in external light is converted into the second light canbe inhibited. Alternatively, a phenomenon in which black display isimpaired by external light can be inhibited. Alternatively, display canbe performed with high contrast. As a result, a novel display panel thatis highly convenient or reliable can be provided.

Embodiments will be described in detail with reference to the drawings.Note that the present invention is not limited to the followingdescription, and it will be readily appreciated by those skilled in theart that modes and details of the present invention can be modified invarious ways without departing from the spirit and scope of the presentinvention. Thus, the present invention should not be construed as beinglimited to the descriptions in the following embodiments. Note that instructures of the invention described below, the same portions orportions having similar functions are denoted by the same referencenumerals in different drawings, and repeated description thereof isomitted.

Embodiment 1

In this embodiment, structures of a display panel of one embodiment ofthe present invention will be described with reference to FIG. 1 to FIG.5 .

FIG. 1 shows structures of the display panel of one embodiment of thepresent invention. FIG. 1(A) is a schematic view illustrating astructure of pixels of the display panel of one embodiment of thepresent invention, and FIG. 1(B) is a schematic view illustrating astructure different from that in FIG. 1(A). FIG. 1(C) shows emissionspectra of the display panel of one embodiment of the present inventionand an absorption spectrum of an absorption layer. Note that a solidline represents the emission spectrum, and a dashed line represents theabsorption spectrum.

FIG. 2 shows emission spectra of the display panel of one embodiment ofthe present invention and absorption spectra of an absorption layer.Note that a solid line represents the emission spectrum, and a dashedline represents the absorption spectrum.

FIG. 3 shows a structure of the display panel of one embodiment of thepresent invention. FIG. 3(A) is a top view of the display panel of oneembodiment of the present invention, and FIG. 3(B) shows part of FIG.3(A).

FIG. 4 shows a structure of the display panel of one embodiment of thepresent invention. FIG. 4(A) is a cross-sectional view along a cuttingline X1-X2, a cutting line X3-X4, and a cutting line X9-X10 and of apixel in FIG. 3(A), and FIG. 4(B) is a circuit diagram illustrating astructure of a pixel circuit 530(i,j).

FIG. 5 shows a structure of the display panel of one embodiment of thepresent invention. FIG. 5(A) is a cross-sectional view of a pixel702(i,j) in FIG. 3(A), and FIG. 5(B) is a cross-sectional viewillustrating part of FIG. 5(A).

Note that in this specification, an integer variable of 1 or more issometimes used in reference numerals. For example, (p) where p is aninteger variable of 1 or more is sometimes used in part of a referencenumeral that specifies any of p components at a maximum. For anotherexample, (m,n) where m and n are each an integer variable of 1 or moreis sometimes used in part of a reference numeral that specifies any ofm×n components at a maximum.

<Structure Example 1 of Display Panel 700>

A display panel 700 described in this embodiment includes a displayregion 231 and a functional layer 520 (see FIG. 3(A) and FIG. 4(A)). Thedisplay region 231 includes the pixel 702(i,j) (see FIG. 3(B)).

<<Structure Example 1 of Pixel 702(i,j)>>

The pixel 702(i,j) includes a display element 550(i,j), a colorconversion layer CC(j), and an absorption layer CF(j) (see FIG. 1(A) andFIG. 1(B)).

<<Structure Example 1 of Display Element 550(i,j)>>

The display element 550(i,j) emits light h1. For example, blue light orultraviolet light can be used as the light h1. A light-emitting elementemitting the light h1 can be used as the display element 550(i,j).Specifically, an organic EL element or the like can be used as thedisplay element 550(i,j).

For example, a tandem light-emitting element including a plurality oflight-emitting units and an intermediate layer can be used as thedisplay element 550(i,j). Specifically, a structure including two ormore light-emitting units containing a material emitting blue light canbe used for the display element 550(i,j). When light-emitting unitscontaining a material emitting the same color are overlapped with eachother with the intermediate layer therebetween, the amount of emittedlight can be increased without increasing the current density. Thisleads to higher reliability of the display panel.

<<Structure Example 1 of Absorption Layer CF(j)>>

The absorption layer CF(j) overlaps with the display element 550(i,j),and the absorption layer CF(j) absorbs the light h1 (see FIG. 1(A), FIG.1(C), or FIG. 2(A)).

For example, a material absorbing the light h1 can be used for theabsorption layer CF(j). Alternatively, a material absorbing the bluelight h1 or ultraviolet light can be used for the absorption layerCF(j). For example, a sharp cut filter transmitting yellow light can beused as the absorption layer CF(j) (see FIG. 1(C)). Alternatively, aband pass filter transmitting green light can be used as the absorptionlayer CF(j) (see FIG. 2(A)). Accordingly, the absorption layer CF(j) canabsorb the light h1 emitted from the display element 550(i,j).Alternatively, the light h1 included in external light can be absorbed.Alternatively, before the light h1 included in external light reachesthe color conversion layer CC(j), its intensity can be weakened.

<<Structure Example 1 of Color Conversion Layer CC(j)>>

The conversion layer CC(j) is sandwiched between the absorption layerCF(j) and the display element 550(i,j). The conversion layer CC(j)converts the light h1 into light h2.

For example, a florescent substance can be used for the color conversionlayer CC(j). Specifically, a quantum dot can be used for the colorconversion layer CC(j).

The light h2 has a spectrum including a high proportion of light with along wavelength compared with the light h1 (see FIG. 1(C)). For example,blue light can be used as the light h1, and green light can be used asthe light h2. Specifically, a quantum dot converting the blue light h1into the green light h2 can be used for the color conversion layerCC(j). Accordingly, the light h1 can be efficiently converted into thelight h2. Alternatively, the light h1 can be converted into the light h2with a narrow half width of the spectrum. Alternatively, a bright colorcan be displayed.

Thus, the light h1 emitted from the display element 550(i,j) can beconverted into the light h2. Alternatively, the light h1 included inexternal light can be weakened before reaching the color conversionlayer CC(j). Alternatively, a phenomenon in which the light h1 includedin external light is converted into the light h2 can be inhibited.Alternatively, a phenomenon in which black display is impaired byexternal light can be inhibited. Alternatively, display can be performedwith high contrast. As a result, a novel display panel that is highlyconvenient or reliable can be provided.

<<Structure Example 2 of Absorption Layer CF(j)>>

For example, the absorption layer CF(j) absorbs the light h1 and lighth3. Note that the light h3 has a spectrum including a high proportion oflight with a long wavelength compared with the light h2 (see FIG. 1(A)and FIG. 2(A)).

Specifically, the green light h2 can be used, and a color filtertransmitting the green light h2 can be used as the absorption layerCF(j). For example, a band pass filter transmitting green light can beused as the absorption layer CF(j) (see FIG. 2(A)). Thus, the absorptionlayer CF(j) can absorb, for example, the blue light h1 and the red lighth3.

Accordingly, the light h1 and the light h3 included in external lightcan be absorbed. Alternatively, a phenomenon in which black display isimpaired by external light can be inhibited. Alternatively, display canbe performed with high contrast. As a result, a novel display panel thatis highly convenient or reliable can be provided.

<<Structure Example 2 of Color Conversion Layer CC(j)>>

For example, the color conversion layer CC(j) converts the light h1 intothe light h2 and the light h3 (see FIG. 1(B) and FIG. 2(A)).

Specifically, the blue light h1 can be converted into the green light h2and the red light h3 using a florescent substance. For example, aquantum dot converting the blue light h1 into the green light h2 and aquantum dot converting the blue light h1 into the red light h3 can bemixed and used for the color conversion layer CC(j).

Thus, the light h1 emitted from the display element 550(i,j) can beconverted into the light h2 and the light h3. Alternatively, theconverted light h3 can be absorbed. Alternatively, a phenomenon in whichthe light h1 included in external light is converted into the light h2and the light h3 can be inhibited. Alternatively, a phenomenon in whichvivid display using the light h2 is impaired by the light h3 can beinhibited. As a result, a novel display panel that is highly convenientor reliable can be provided.

<Structure Example 2 of Display Panel 700>

In the display panel described in this embodiment, the display region231 includes a pixel 702(i,j+1) (see FIG. 3(B)).

<<Structure Example of Pixel 702(i,j+1)>>

The pixel 702(i,j+1) includes a display element 550(i,j+1), a colorconversion layer CC(j+1), and an absorption layer CF(j+1) (see FIG. 1(A)and FIG. 1 (B)).

<<Structure Example of Display Element 550(i,j+1)>>

The display element 550(i,j+1) emits the light h1. For example, bluelight or ultraviolet light can be used as the light h1, and alight-emitting element emitting the light h1 can be used as the displayelement 550(i,j+1). Specifically, an organic EL element or the like canbe used as the display element 550(i,j+1). For example, the samestructure as a structure used for the display element 550(i,j) can beused for the display element 550(i,j+1).

<<Structure Example 1 of Absorption Layer CF(j+1)>>

The absorption layer CF(j+1) overlaps with the display element550(i,j+1), and the absorption layer CF(j+1) absorbs the light h1 (seeFIG. 1(A), FIG. 1(C), or FIG. 2(B)).

For example, a material absorbing the light h1 can be used for theabsorption layer CF(j+1). A material absorbing blue light or ultravioletlight can be used for the absorption layer CF(j+1). For example, a sharpcut filter transmitting yellow light can be used as the absorption layerCF(j) (see FIG. 1(C)). Alternatively, a sharp cut filter transmittingred light can be used as the absorption layer CF(j+1) (see FIG. 2(B)).Accordingly, the absorption layer CF(j+1) can absorb the light h1emitted from the display element 550(i,j+1). Alternatively, the light h1included in external light can be absorbed. Alternatively, before thelight h1 included in external light reaches the color conversion layerCC(j+1), its intensity can be weakened.

<<Structure Example 1 of Color Conversion Layer CC(j+1)>>

The color conversion layer CC(j+1) is sandwiched between the absorptionlayer CF(j+1) and the display element 550(i,j+1), and the colorconversion layer CC(j+1) converts the light h1 into the light h3.

For example, a florescent substance can be used for the color conversionlayer CC(j+1). Specifically, a quantum dot can be used for the colorconversion layer CC(j+1). For example, a quantum dot converting the bluelight h1 into the red light h3 can be used for the color conversionlayer CC(j+1).

Thus, the light h1 emitted from the display element 550(i,j+1) can beconverted into the light h3. Alternatively, the light h1 included inexternal light can be weakened before reaching the color conversionlayer CC(j+1). Alternatively, a phenomenon in which the light h1included in external light is converted into the light h3 can beinhibited. Alternatively, a phenomenon in which black display isimpaired by external light can be inhibited. Alternatively, display canbe performed with high contrast. Alternatively, the display element550(i,j+1) can be formed through the same process as that for formingthe display element 550(i,j). As a result, a novel display panel that ishighly convenient or reliable can be provided.

<<Structure Example 2 of Absorption Layer CF(j+1)>>

For example, the absorption layer CF(j+1) absorbs the light h1 and thelight h2 (see FIG. 1(A) and FIG. 2(B)).

Specifically, the red light h3 can be used, and a color filtertransmitting the red light h3 can be used as the absorption layerCF(j+1). For example, a band pass filter transmitting red light can beused as the absorption layer CF(j+1) (see FIG. 2(B)). Thus, theabsorption layer CF(j+1) can absorb, for example, the blue light h1 andthe green light h2.

Accordingly, the light h1 and the light h2 can be absorbed.Alternatively, a phenomenon in which black display is impaired byexternal light can be inhibited. Alternatively, display can be performedwith high contrast. As a result, a novel display panel that is highlyconvenient or reliable can be provided.

<<Structure Example 2 of Color Conversion Layer CC(j+1)>>

For example, the color conversion layer CC(j+1) converts the light h1into the light h2 and the light h3 (see FIG. 1(B) and FIG. 2(B)).

Specifically, the blue light h1 can be converted into the green light h2and the red light h3 using a florescent substance. For example, aquantum dot converting the blue light h1 into the green light h2 and aquantum dot converting the blue light h1 into the red light h3 can bemixed and used for the color conversion layer CC(j+1).

Thus, the light h1 emitted from the display element 550(i,j+1) can beconverted into the light h2 and the light h3. Alternatively, theconverted light h2 can be absorbed. Alternatively, a phenomenon in whichthe light h1 included in external light is converted into the light h2and the light h3 can be inhibited. Alternatively, a phenomenon in whichvivid display using the light h3 is impaired by the light h2 can beinhibited. As a result, a novel display panel that is highly convenientor reliable can be provided.

<Structure Example 3 of Display Panel 700>

In the display panel described in this embodiment, the display region231 includes a pixel 702(i,j+2) (see FIG. 3(C)).

<<Structure Example 1 of Pixel 702(i,j+2)>>

The pixel 702(i,j+2) includes a display element 550(i,j+2) (see FIG.1(A) and FIG. 1(B)).

<<Structure Example of Display Element 550(i,j+2)>>

The display element 550(i,j+2) emits the light h1. For example, bluelight or ultraviolet light can be used as the light h1, and alight-emitting element emitting the light h1 can be used as the displayelement 550(i,j+2). Specifically, an organic EL element or the like canbe used as the display element 550(i,j+2). For example, the samestructure as a structure used for the display element 550(i,j) can beused for the display element 550(i,j+2).

Thus, display can be performed using the light h1, the light h2, and thelight h3. Alternatively, full color display can be performed using onlydisplay elements emitting the light h1. Alternatively, the displayelement 550(i,j+1) and the display element 550(i,j+2) can be formedthrough the same process as that for forming the display element550(i,j). As a result, a novel display panel that is highly convenientor reliable can be provided.

<Structure Example 4 of Display Panel 700>

In the display panel described in this embodiment, the display region231 includes the pixel 702(i,j), the pixel 702(i,j+1), and the pixel702(i,j+2) (see FIG. 3(C)).

<<Structure Example 2 of Pixel 702(i,j+2)>>

The pixel 702(i,j+2) includes a color conversion layer CC(j+2) and anabsorption layer CF(j+2) (see FIG. 1(B)).

<<Structure Example of Absorption Layer CF(j+2)>>

The absorption layer CF(j+2) overlaps with the display element550(i,j+2), and the absorption layer CF(j+2) absorbs the light h2 andthe light h3 (see FIG. 2(C)).

Specifically, a color filter transmitting blue light can be used as theabsorption layer CF(j+2). For example, a band pass filter transmittingblue light can be used as the absorption layer CF(j+2) (see FIG. 2(C)).Thus, the absorption layer CF(j+2) can absorb, for example, the greenlight h2 and the red light h3.

<<Structure Example 3 of Color Conversion Layer CC(j)>>

The conversion layer CC(j) converts the light h1 into the light h2, thelight h3, and light h4 (see FIG. 1(B)). In other words, the light h1 isconverted into white light.

For example, a florescent substance can be used for the color conversionlayer CC(j). Specifically, a quantum dot converting the light h1 intothe light h2, a quantum dot converting the light h1 into the light h3,and a quantum dot converting the light h1 into the light h4 can be usedfor the color conversion layer CC(j). Note that the color conversionlayer CC(j) may transmit part of the light h1.

<<Structure Example 3 of Color Conversion Layer CC(j+1)>>

The color conversion layer CC(j+1) converts the light h1 into the lighth2, the light h3, and the light h4. For example, the same structure asthat of the color conversion layer CC(j) can be used for the colorconversion layer CC(j+1).

<<Structure Example of Color Conversion Layer CC(j+2)>>

The color conversion layer CC(j+2) is sandwiched between the absorptionlayer CF(j+2) and the display element 550(i,j+2).

The conversion layer CC(j+2) converts the light h1 into the light h2,the light h3, and the light h4. For example, the same structure as thatof the color conversion layer CC(j) can be used for the color conversionlayer CC(j+1).

The light h4 has a spectrum including a high proportion of light with ashort wavelength compared with the light h2 (see FIG. 1(C)). Forexample, blue light can be used as the light h1, green light can be usedas the light h2, and blue light can be used as the light h4.

Thus, the light h1 emitted from the display element 550(i,j+2) can beconverted into the light h2, the light h3, and the light h4.Alternatively, the converted light h2 and light h3 can be absorbed.Alternatively, a phenomenon in which vivid display using the light h4 isimpaired by the light h2 and the light h3 can be inhibited.Alternatively, the same structure as that of the color conversion layerCC(j) can be used for the color conversion layer CC(j+1) and the colorconversion layer CC(j+2). As a result, a novel display panel that ishighly convenient or reliable can be provided.

<Structure Example 5 of Display Panel 700>

In the display panel described in this embodiment, the pixel 702(i,j)emits light of a color that has a chromaticity x of greater than orequal to 0.130 and less than or equal to 0.250 and a chromaticity y ofgreater than 0.710 and less than or equal to 0.810 in the CIE 1931chromaticity coordinates.

Moreover, the pixel 702(i,j+1) emits light of a color that has achromaticity x of greater than 0.680 and less than or equal to 0.720 anda chromaticity y of greater than or equal to 0.260 and less than orequal to 0.320 in the CIE 1931 chromaticity coordinates.

Furthermore, the pixel 702(i,j+2) emits light of a color that has achromaticity x of greater than or equal to 0.120 and less than or equalto 0.170 and a chromaticity y of greater than or equal to 0.020 and lessthan 0.060 in the CIE 1931 chromaticity coordinates

The pixel 702(i,j), the pixel 702(i,j+1), and the pixel 702(i,j+2) areprovided so that the area ratio of their color gamut to the BT.2020color gamut in the CIE chromaticity diagram (x,y) is higher than orequal to 80%, or alternatively, the color gamut coverage is higher thanor equal to 75%. Preferably, they are provided so that the area ratio ishigher than or equal to 90%, or alternatively, the coverage is higherthan or equal to 85%.

Thus, a vivid image can be displayed. Accordingly, display with anextremely wide color gamut satisfying a color gamut of RecommendationITU-R BT.2020-2 standard, which is an international standard, can beperformed. As a result, a novel display panel that is highly convenientor reliable can be provided.

<<Structure Example 2 of Pixel 702(i,j)>>

The pixel 702(i,j) includes the display element 550(i,j) and the pixelcircuit 530(i,j).

The display element 550(i,j) is electrically connected to the pixelcircuit 530(i,j).

<<Structure Example of Functional Layer 520>>

The functional layer 520 includes the pixel circuit 530(i,j). Moreover,the functional layer 520 has an opening portion 591A. For example, inthe opening portion 591A, the pixel circuit 530(i,j) is electricallyconnected to the display element 550(i,j) (see FIG. 4(A)).

<<Structure Example 1 of Pixel Circuit 530(i,j)>>

The pixel circuit 530(i,j) is electrically connected to a scan lineG21(i) and a signal line S21(j) (see FIG. 4(B)).

A switch, a transistor, a diode, a resistor, an inductor, a capacitor,or the like can be used in the pixel circuit 530(i,j), for example.Specifically, a transistor can be used as a switch.

<<Structure Example 2 of Pixel Circuit 530(i,j)>>

For example, a switch SW21, a transistor M, and a capacitor C21 can beused in the pixel circuit 530(i,j).

The pixel circuit 530(i,j) includes the transistor M, the capacitor C21,the switch SW21, and a node N1(i,j).

The transistor M includes a first electrode electrically connected to aconductive film ANO and a second electrode electrically connected to thedisplay element 550(i,j).

The capacitor C21 includes a first electrode electrically connected to agate electrode of the transistor M and a second electrode electricallyconnected to the conductive film ANO.

The switch SW21 includes a first terminal to which a first signal issupplied and includes a second terminal electrically connected to thegate electrode of the transistor M. Note that the switch SW21 has afunction of switching a conducting state or a non-conducting state onthe basis of the first signal.

The display element 550(i,j) performs display on the basis of apotential VN of the node N1(i,j).

<<Structure Example 2 of Pixel Circuit 530(i,j)>>

The pixel circuit 530(i,j) includes the transistor M, the capacitor C21,the switch SW21, the node N1(i,j), a capacitor C22, and a switch SW22.

The transistor M includes the first electrode electrically connected tothe conductive film ANO and the second electrode electrically connectedto the display element 550(i,j).

The capacitor C21 includes the first electrode electrically connected tothe gate electrode of the transistor M and the second electrodeelectrically connected to the conductive film ANO.

The switch SW21 includes the first terminal to which the first signal issupplied and includes the second terminal electrically connected to thegate electrode of the transistor M. The switch SW21 has a function ofswitching the conducting state or the non-conducting state on the basisof the first signal.

The capacitor C22 includes a first terminal electrically connected tothe node N1(i,j), and capacitor C22 includes a second terminalelectrically connected to the switch SW22.

The switch SW22 includes a first terminal to which a second signal issupplied. Note that the switch SW22 has a function of switching aconducting state or a non-conducting state on the basis of the secondsignal.

Note that the switch SW22 is in the conducting state when the switchSW21 changes from the conducting state to the non-conducting state, theswitch SW22 has a function of changing from the non-conducting state tothe conducting state when the switch SW21 is in the non-conductingstate, and the switch SW22 has a function of changing from theconducting state to the non-conducting state when the switch SW21 is inthe non-conducting state.

The display element 550(i,j) performs display on the basis of thepotential VN of the node N1(i,j).

Thus, a potential of the node N1(i,j) can be controlled using the switchSW21 and the switch SW22. Alternatively, the potential of the nodeN1(i,j) can be controlled using the switch SW21, and the potential ofthe node N1(i,j) can be changed using the switch SW22. Alternatively,the changing potential can be supplied to the display element 550(i,j).Alternatively, display can be performed on the basis of the changingpotential. Alternatively, the display of the display element 550(i,j)can be changed. Alternatively, an operation of the display element550(i,j) can be emphasized. Alternatively, the response of the displayelement 550(i,j) can be made faster. As a result, a novel display panelthat is highly convenient or reliable can be provided.

<<Structure Example 1 of Transistor>>

A bottom-gate transistor or a top-gate transistor can be used in thepixel circuit 530(0, for example.

A transistor includes a semiconductor film 508, a conductive film 504, aconductive film 512A, and a conductive film 512B (see FIG. 5(B)).

The semiconductor film 508 includes a region 508A electrically connectedto the conductive film 512A and a region 508B electrically connected tothe conductive film 512B. The semiconductor film 508 includes a region508C between the region 508A and the region 508B.

The conductive film 504 includes a region overlapping with the region508C, and the conductive film 504 has a function of a gate electrode.

An insulating film 506 includes a region sandwiched between thesemiconductor film 508 and the conductive film 504. The insulating film506 has a function of a gate insulating film.

The conductive film 512A has one of a function of a source electrode anda function of a drain electrode, and the conductive film 512B has theother of the function of the source electrode and the function of thedrain electrode.

A conductive film 524 can be used for the transistor. The conductivefilm 524 includes a region; between the region and the conductive film504, the semiconductor film 508 is positioned. The conductive film 524has a function of a second gate electrode. The conductive film 524 canbe electrically connected to the conductive film 504, for example. Notethat the conductive film 524 can be used as the scan line G21(i).

Note that in a process of forming the semiconductor film used in thetransistor of the pixel circuit, the semiconductor film used in atransistor of a driver circuit can be formed.

<<Structure Example 1 of Semiconductor Film 508>>

A semiconductor containing a Group 14 element can be used for thesemiconductor film 508, for example. Specifically, a semiconductorcontaining silicon can be used for the semiconductor film 508.

[Hydrogenated Amorphous Silicon]

For example, hydrogenated amorphous silicon can be used for thesemiconductor film 508. Alternatively, microcrystalline silicon or thelike can be used for the semiconductor film 508. Thus, a display panelhaving less display unevenness than a display panel that usespolysilicon for the semiconductor film 508, for example, can beprovided. Alternatively, the size of the display panel can be easilyincreased.

[Polysilicon]

For example, polysilicon can be used for the semiconductor film 508. Inthis case, for example, the field-effect mobility of the transistor canbe higher than that of a transistor that uses hydrogenated amorphoussilicon for the semiconductor film 508. Alternatively, for example, thedriving capability can be higher than that of a transistor that useshydrogenated amorphous silicon for the semiconductor film 508.Alternatively, for example, the aperture ratio of the pixel can behigher than that in the case of using a transistor that useshydrogenated amorphous silicon for the semiconductor film 508.

Alternatively, for example, the reliability of the transistor can behigher than that of a transistor that uses hydrogenated amorphoussilicon for the semiconductor film 508.

Alternatively, the temperature required for fabrication of thetransistor can be lower than that required for a transistor that usessingle crystal silicon, for example.

Alternatively, the semiconductor film used for the transistor in thedriver circuit can be formed through the same process as thesemiconductor film used for the transistor in the pixel circuit.Alternatively, the driver circuit can be formed over the same substrateover which the pixel circuit is formed. Alternatively, the number ofcomponents included in an electronic device can be reduced.

[Single Crystal Silicon]

For example, single crystal silicon can be used for the semiconductorfilm. In this case, for example, the resolution can be higher than thatof a display panel that uses hydrogenated amorphous silicon for thesemiconductor film 508. Alternatively, for example, a display panelhaving less display unevenness than a display panel that usespolysilicon for the semiconductor film 508 can be provided.Alternatively, for example, smart glasses or a head mounted display canbe provided.

<<Structure Example 2 of Semiconductor Film 508>>

For example, a metal oxide can be used for the semiconductor film 508.Thus, a pixel circuit can hold an image signal for a longer time than apixel circuit utilizing a transistor that uses amorphous silicon for asemiconductor film. Specifically, a selection signal can be supplied ata frequency of lower than 30 Hz, preferably lower than 1 Hz, furtherpreferably less than once per minute with the suppressed occurrence offlickers. Consequently, fatigue accumulation in a user of a dataprocessing device can be reduced. Moreover, power consumption fordriving can be reduced.

A transistor using an oxide semiconductor can be used, for example.Specifically, an oxide semiconductor containing indium or an oxidesemiconductor containing indium, gallium, and zinc can be used for thesemiconductor film.

A transistor having a lower leakage current in an off state than atransistor that uses amorphous silicon for a semiconductor film can beused, for example. Specifically, a transistor that uses an oxidesemiconductor for a semiconductor film can be used.

A 25-nm-thick film containing indium, gallium, and zinc can be used asthe semiconductor film 508, for example.

A conductive film in which a 10-nm-thick film containing tantalum andnitrogen and a 300-nm-thick film containing copper are stacked can beused as the conductive film 504, for example. Note that the filmcontaining copper includes a region; between the region and theinsulating film 506, the film containing tantalum and nitrogen ispositioned.

A stacked-layer film in which a 400-nm-thick film containing silicon andnitrogen and a 200-nm-thick film containing silicon, oxygen, andnitrogen are stacked can be used for the insulating film 506, forexample. Note that the film containing silicon and nitrogen includes aregion; between the region and the semiconductor film 508, the filmcontaining silicon, oxygen, and nitrogen is positioned.

A conductive film in which a 50-nm-thick film containing tungsten, a400-nm-thick film containing aluminum, and a 100-nm-thick filmcontaining titanium are stacked in this order can be used as theconductive film 512A or the conductive film 512B, for example. Note thatthe film containing tungsten includes a region in contact with thesemiconductor film 508.

A manufacturing line for a bottom-gate transistor that uses amorphoussilicon as a semiconductor can be easily remodeled into a manufacturingline for a bottom-gate transistor that uses an oxide semiconductor as asemiconductor, for example. Furthermore, for example, a manufacturingline for a top-gate transistor that uses polysilicon as a semiconductorcan be easily remodeled into a manufacturing line for a top-gatetransistor that uses an oxide semiconductor as a semiconductor. Ineither remodeling, an existing manufacturing line can be effectivelyutilized.

Accordingly, flickering can be suppressed. Alternatively, the powerconsumption can be reduced. Alternatively, a moving image with quickmovements can be smoothly displayed. Alternatively, a photograph and thelike can be displayed with a wide range of grayscale. As a result, anovel display panel that is highly convenient or reliable can beprovided.

<<Structure Example 3 of Semiconductor Film 508>>

For example, a compound semiconductor can be used as the semiconductorof the transistor. Specifically, a semiconductor containing galliumarsenide can be used.

For example, an organic semiconductor can be used as the semiconductorof the transistor. Specifically, an organic semiconductor containing anyof polyacenes or graphene can be used for the semiconductor film.

<<Structure Example 1 of Capacitor>>

A capacitor includes a plurality of conductive films and an insulatingfilm. One conductive film overlaps with the other conductive film, andthe insulating film has a region sandwiched between the conductivefilms.

For example, the conductive film 504, the conductive film 512A, and theinsulating film 506 can be used in the capacitor.

<<Structure Example 2 of Functional Layer 520>>

The functional layer 520 includes an insulating film 521, an insulatingfilm 518, an insulating film 516, the insulating film 506, an insulatingfilm 501C, and the like (see FIG. 5(A)).

The insulating film 521 includes a region sandwiched between the pixelcircuit 530(0 and the display element 550(i,j).

The insulating film 518 includes a region sandwiched between theinsulating film 521 and the insulating film 501C.

The insulating film 516 includes a region sandwiched between theinsulating film 518 and the insulating film 501C.

The insulating film 506 includes a region sandwiched between theinsulating film 516 and the insulating film 501C.

[Insulating Film 521]

An insulating inorganic material, an insulating organic material, or aninsulating composite material containing an inorganic material and anorganic material, for example, can be used for the insulating film 521.

Specifically, an inorganic oxide film, an inorganic nitride film, aninorganic oxynitride film, or the like, or a stacked-layer material inwhich a plurality of films selected from these films are stacked can beused as the insulating film 521.

For example, a film including a silicon oxide film, a silicon nitridefilm, a silicon oxynitride film, an aluminum oxide film, or the like, ora film including a stacked-layer material in which a plurality of filmsselected from these films are stacked can be used as the insulating film521. Note that the silicon nitride film is a dense film and has anexcellent function of inhibiting diffusion of impurities.

For example, for the insulating film 521, polyester, polyolefin,polyamide, polyimide, polycarbonate, polysiloxane, an acrylic resin, orthe like, or a stacked-layer material, a composite material, or the likeof a plurality of resins selected from these resins can be used.Alternatively, a photosensitive material may be used. Thus, theinsulating film 521 can planarize a level difference due to variouscomponents overlapping with the insulating film 521, for example.

Note that polyimide is excellent in thermal stability, insulatingproperty, toughness, low dielectric constant, low coefficient of thermalexpansion, chemical resistance, and other properties compared with otherorganic materials. Accordingly, in particular, polyimide can be suitablyused for the insulating film 521 or the like.

For example, a film formed using a photosensitive material can be usedas the insulating film 521. Specifically, a film formed usingphotosensitive polyimide, a photosensitive acrylic resin, or the likecan be used as the insulating film 521.

[Insulating Film 518]

The material that can be used for the insulating film 521, for example,can be used for the insulating film 518.

For example, a material that has a function of inhibiting diffusion ofoxygen, hydrogen, water, an alkali metal, an alkaline earth metal, andthe like can be used for the insulating film 518. Specifically, anitride insulating film can be used as the insulating film 518. Forexample, silicon nitride, silicon nitride oxide, aluminum nitride,aluminum nitride oxide, or the like can be used for the insulating film518. Thus, diffusion of impurities to the semiconductor film of thetransistor can be inhibited.

[Insulating Film 516]

The material that can be used for the insulating film 521, for example,can be used for the insulating film 516.

Specifically, a film formed by a fabrication method different from thatof the insulating film 518 can be used as the insulating film 516.

[Insulating Film 506]

The material that can be used for the insulating film 521, for example,can be used for the insulating film 506.

Specifically, a film including a silicon oxide film, a siliconoxynitride film, a silicon nitride oxide film, a silicon nitride film,an aluminum oxide film, a hafnium oxide film, an yttrium oxide film, azirconium oxide film, a gallium oxide film, a tantalum oxide film, amagnesium oxide film, a lanthanum oxide film, a cerium oxide film, or aneodymium oxide film can be used as the insulating film 506.

[Insulating Film 501D]

An insulating film 501D includes a region sandwiched between theinsulating film 501C and the insulating film 516.

The material that can be used for the insulating film 506, for example,can be used for the insulating film 501D.

[Insulating Film 501C]

The material that can be used for the insulating film 521, for example,can be used for the insulating film 501C. Specifically, a materialcontaining silicon and oxygen can be used for the insulating film 501C.Thus, diffusion of impurities into the pixel circuit, the displayelement, or the like can be inhibited.

<<Structure Example 3 of Functional Layer 520>>

The functional layer 520 includes a conductive film, a wiring, and aterminal. A material having conductivity can be used for the wiring, anelectrode, the terminal, the conductive film, or the like.

For example, an inorganic conductive material, an organic conductivematerial, a metal, a conductive ceramic, or the like can be used for thewiring or the like.

Specifically, a metal element selected from aluminum, gold, platinum,silver, copper, chromium, tantalum, titanium, molybdenum, tungsten,nickel, iron, cobalt, palladium, and manganese, or the like can be usedfor the wiring or the like. Alternatively, an alloy containing theabove-described metal element, or the like can be used for the wiring orthe like. In particular, an alloy of copper and manganese is suitablefor microfabrication using a wet etching method.

Specifically, a two-layer structure in which a titanium film is stackedover an aluminum film, a two-layer structure in which a titanium film isstacked over a titanium nitride film, a two-layer structure in which atungsten film is stacked over a titanium nitride film, a two-layerstructure in which a tungsten film is stacked over a tantalum nitridefilm or a tungsten nitride film, a three-layer structure of a titaniumfilm, an aluminum film stacked over the titanium film, and a titaniumfilm further formed thereover, or the like can be used for the wiring orthe like.

Specifically, a conductive oxide such as indium oxide, indium tin oxide,indium zinc oxide, zinc oxide, or zinc oxide to which gallium is addedcan be used for the wiring or the like.

Specifically, a film containing graphene or graphite can be used for thewiring or the like.

For example, a film containing graphene oxide is formed and the filmcontaining graphene oxide is reduced, so that a film containing graphenecan be formed. As a reducing method, a method with application of heat,a method using a reducing agent, or the like can be given.

For example, a film including a metal nanowire can be used for thewiring or the like. Specifically, a nanowire containing silver can beused.

Specifically, a conductive high molecule can be used for the wiring orthe like.

Note that a terminal 519B and a flexible printed board FPC1 can beelectrically connected to each other using a conductive material ACF1,for example. Specifically, the terminal 519B and the flexible printedboard FPC1 can be electrically connected to each other using aconductive material CP, for example.

<Structure Example 6 of Display Panel 700>

The display panel 700 includes an insulating film 528 (see FIG. 5(A)).

<<Insulating Film 528>>

The insulating film 528 includes a region sandwiched between theinsulating film 521 and a base material 770 and includes an openingportion in a region overlapping with the display element 550(i,j) (seeFIG. 5(A)).

The material that can be used for the insulating film 521, for example,can be used for the insulating film 528. Specifically, a silicon oxidefilm, a film containing an acrylic resin, a film containing polyimide,or the like can be used as the insulating film 528.

<<Insulating Film 573>>

An insulating film 573 includes a region; between the region and thefunctional layer 520, the display element 550(i,j) is positioned (seeFIG. 5(A)).

For example, a single film or a stacked-layer film in which a pluralityof films are stacked can be used as the insulating film 573.Specifically, a stacked-layer film in which an insulating film 573Aformed by a method that hardly damages the display element 550(i,j) anda dense insulating film 573B with a few defects are stacked can be usedas the insulating film 573. This can inhibit diffusion of impuritiesinto the display element 550(i,j).

<<Structure Example 2 of Display Element 550(i,j)>>

The display element 550(i,j) has a function of emitting light.

The display element 550(i,j) includes a layer 553(j) containing alight-emitting material (see FIG. 5(A)).

A display element having a function of emitting light, for example, canbe used as the display element 550(i,j). Specifically, an organicelectroluminescence element, an inorganic electroluminescence element, alight-emitting diode, a QDLED (Quantum Dot LED), or the like can be usedas the display element 550(i,j).

<<Structure Example 1 of Layer 553(j) Containing Light-EmittingMaterial>>

A belt-like stacked-layer material that is long in the column directionalong the signal line S21(j) can be used for the layer 553(j) containinga light-emitting material, for example.

Specifically, materials emitting light with different hues can be usedfor the layer 553(j) containing a light-emitting material, a layer553(j+1) containing a light-emitting material, and a layer 553(j+2)containing a light-emitting material. Thus, for example, the hue of thelight emitted from the display element 550(i,j) can be different betweencolumns.

For example, a material that emits blue light, a material that emitsgreen light, and a material that emits red light can be used as thematerials emitting light with different hues.

<<Structure Example 2 of Layer 553(j) Containing Light-EmittingMaterial>>

A stacked-layer material stacked to emit white light can be used for thelayer 553(j) containing a light-emitting material, for example.

Specifically, materials emitting light with different hues can be usedfor the layer 553(j) containing a light-emitting material.

For example, a stacked-layer material in which a layer containing alight-emitting material including a fluorescent substance that emitsblue light and a layer containing materials that are other thanfluorescent substances and that emit green light and red light arestacked can be used for the layer 553(j) containing a light-emittingmaterial. Alternatively, a stacked-layer material in which a layercontaining a material that is other than a fluorescent substance andthat emits yellow light is stacked can be used for the layer 553(j)containing a light-emitting material.

A light-emitting unit can be used for the layer 553(j) containing alight-emitting material, for example. The light-emitting unit includesone region where electrons injected from one side are recombined withholes injected from the other side. The light-emitting unit contains alight-emitting material, and the light-emitting material releases energygenerated by recombination of electrons and holes as light.

A plurality of light-emitting units and an intermediate layer can beused for the layer 553(j) containing a light-emitting material, forexample. The intermediate layer includes a region sandwiched between twolight-emitting units. The intermediate layer includes acharge-generation region, and the intermediate layer has functions ofsupplying holes to the light-emitting unit provided on the cathode sideand supplying electrons to the light-emitting unit provided on the anodeside. Furthermore, a structure including a plurality of light-emittingunits and an intermediate layer is referred to as a tandemlight-emitting element in some cases.

For example, a light-emitting unit containing a material emitting lightwith one hue and a light-emitting unit containing a material emittinglight with a different hue can be used for the layer 553(j) containing alight-emitting material.

For example, a high molecular compound (e.g., an oligomer, a dendrimer,or a polymer), a middle molecular compound (a compound between a lowmolecular compound and a high molecular compound with a molecular weightgreater than or equal to 400 and less than or equal to 4000), or thelike can be used for the layer 553(j) containing a light-emittingmaterial.

<<Electrode 551(i,j) and Electrode 552>>

An electrode 551(i,j) is electrically connected to the pixel circuit530(i,j) in the opening portion 591A (see FIG. 4(A) or FIG. 5(A)).

The electrode 551(i,j) is provided with the insulating film 528 in theperiphery. In other words, the insulating film 528 includes an openingportion, and the electrode 551(i,j) overlaps with the opening portion.Thus, a short circuit between the electrode 551(i,j) and an electrode552 can be prevented.

For example, the material that can be used for the wiring or the likecan be used for the electrode 551(i,j) or the electrode 552.Specifically, a material that has a visible-light-transmitting propertycan be used for the electrode 551(i,j) or the electrode 552.

For example, a conductive oxide, a conductive oxide containing indium,indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, zincoxide to which gallium is added, or the like can be used. Alternatively,a metal film thin enough to transmit light can be used. Alternatively, amaterial that has a visible-light-transmitting property can be used.

For example, a metal film that transmits part of light and reflectsanother part of the light can be used for the electrode 551(i,j) or theelectrode 552. Thus, for example, the distance between the electrode551(i,j) and the electrode 552 can be adjusted. Alternatively, amicrocavity structure can be provided in the display element 550(i,j).Alternatively, light of a predetermined wavelength can be extracted moreefficiently than other light. Alternatively, light with a narrow halfwidth of a spectrum can be extracted. Alternatively, light of a brightcolor can be extracted.

For example, a film that reflects light efficiently can be used for theelectrode 551(i,j) or the electrode 552. Specifically, a materialcontaining silver, palladium, and the like or a material containingsilver, copper, and the like can be used for the metal film.

<Structure Example 7 of Display Panel 700>

The display panel 700 includes a base material 510, the base material770, and a sealant 705 (see FIG. 5(A)). In addition, the display panel700 includes a functional film 770P.

<<Base Material 510 and Base Material 770>>

A light-transmitting material can be used for the base material 510 orthe base material 770.

For example, a flexible material can be used for the base material 510or the base material 770. Thus, a flexible display panel can beprovided.

For example, a material with a thickness less than or equal to 0.7 mmand greater than or equal to 0.1 mm can be used. Specifically, amaterial polished to a thickness of approximately 0.1 mm can be used.Thus, the weight can be reduced.

For example, a glass substrate of the 6th generation (1500 mm×1850 mm),the 7th generation (1870 mm×2200 mm), the 8th generation (2200 mm×2400mm), the 9th generation (2400 mm×2800 mm), the 10th generation (2950mm×3400 mm), or the like can be used as the base material 510 or thebase material 770. Thus, a large-sized display device can be fabricated.

For the base material 510 or the base material 770, an organic material,an inorganic material, a composite material of an organic material andan inorganic material or the like, or the like can be used.

For example, an inorganic material such as glass, ceramic, or a metalcan be used. Specifically, non-alkali glass, soda-lime glass, potashglass, crystal glass, aluminosilicate glass, tempered glass, chemicallytempered glass, quartz, sapphire, or the like can be used for the basematerial 510 or the base material 770. Alternatively, aluminosilicateglass, tempered glass, chemically tempered glass, sapphire, or the likecan be suitably used for the base material 510 or the base material 770that is provided on the side close to a user of the display panel. Thus,the display panel can be prevented from being broken or damaged by theuse thereof.

Specifically, an inorganic oxide film, an inorganic nitride film, aninorganic oxynitride film, or the like can be used. For example, asilicon oxide film, a silicon nitride film, a silicon oxynitride film,an aluminum oxide film, or the like can be used. Stainless steel,aluminum, or the like can be used for the base material 510 or the basematerial 770.

For example, a single crystal semiconductor substrate of silicon orsilicon carbide, a polycrystalline semiconductor substrate, a compoundsemiconductor substrate of silicon germanium or the like, an SOIsubstrate, or the like can be used as the base material 510 or the basematerial 770. Thus, a semiconductor element can be formed over the basematerial 510 or the base material 770.

For example, an organic material such as resin, a resin film, or plasticcan be used for the base material 510 or the base material 770.Specifically, a material containing polyester, polyolefin, polyamide(nylon, aramid, or the like), polyimide, polycarbonate, polyurethane, anacrylic resin, an epoxy resin, or a resin having a siloxane bond can beused for the base material 510 or the base material 770. For example, aresin film, a resin plate, a stacked-layer material, or the likecontaining any of these materials can be used. Thus, the weight can bereduced. Alternatively, for example, the frequency of occurrence ofbreakage or the like due to dropping can be reduced.

Specifically, polyethylene terephthalate (PET), polyethylene naphthalate(PEN), polyethersulfone (PES), a cycloolefin polymer (COP), acycloolefin copolymer (COC), or the like can be used for the basematerial 510 or the base material 770.

For example, a composite material formed by attaching a metal plate, athin glass plate, or a film of an inorganic material or the like and aresin film or the like to each other can be used for the base material510 or the base material 770. For example, a composite material formedby dispersing a fibrous or particulate metal, glass, an inorganicmaterial, or the like into resin can be used for the base material 510or the base material 770. For example, a composite material formed bydispersing a fibrous or particulate resin, an organic material, or thelike into an inorganic material can be used for the base material 510 orthe base material 770.

Furthermore, a single-layer material or a material in which a pluralityof layers are stacked can be used for the base material 510 or the basematerial 770. For example, a material in which insulating films and thelike are stacked can be used. Specifically, a material in which one or aplurality of films selected from a silicon oxide layer, a siliconnitride layer, a silicon oxynitride layer, and the like are stacked canbe used. Thus, diffusion of impurities contained in the base materialscan be prevented, for example. Alternatively, diffusion of impuritiescontained in glass or resin can be prevented. Alternatively, diffusionof impurities that pass through resin can be prevented.

Furthermore, paper, wood, or the like can be used for the base material510 or the base material 770.

For example, a material having heat resistance high enough to withstandheat treatment in the fabricating process can be used for the basematerial 510 or the base material 770. Specifically, a material havingheat resistance to heat applied in the process of directly forming thetransistor, the capacitor, or the like can be used for the base material510 or the base material 770.

For example, a method in which an insulating film, a transistor, acapacitor, or the like is formed on a substrate which is for use in theprocess and has heat resistance to heat applied in the fabricatingprocess, and the formed insulating film, transistor, capacitor, or thelike is transferred to the base material 510 or the base material 770can be used. Accordingly, an insulating film, a transistor, a capacitor,or the like can be formed on a flexible substrate, for example.

<<Sealant 705>>

The sealant 705 includes a region sandwiched between the functionallayer 520 and the base material 770 and has a function of bonding thefunctional layer 520 and the base material 770 together.

An inorganic material, an organic material, a composite material of aninorganic material and an organic material, or the like can be used forthe sealant 705.

For example, an organic material such as a thermally fusible resin or acurable resin can be used for the sealant 705.

For example, an organic material such as a reactive curable adhesive, aphotocurable adhesive, a thermosetting adhesive, and/or an anaerobicadhesive can be used for the sealant 705.

Specifically, an adhesive containing an epoxy resin, an acrylic resin, asilicone resin, a phenol resin, a polyimide resin, an imide resin, a PVC(polyvinyl chloride) resin, a PVB (polyvinyl butyral) resin, an EVA(ethylene vinyl acetate) resin, or the like can be used for the sealant705.

<Structure Example 8 of Display Panel 700>

The display panel 700 includes a functional layer 720 and the functionalfilm 770P (see FIG. 5(A)).

<<Functional Layer 720>>

The functional layer 720 includes the absorption layer CF(j), aninsulating film 771, the color conversion layer CC(j), and alight-blocking film BM.

The absorption layer CF(j) includes a region sandwiched between the basematerial 770 and the display element 550(i,j). The color conversionlayer CC(j) includes a region sandwiched between the absorption layerCF(j) and the display element 550(i,j).

For example, a material that selectively transmits light of apredetermined color can be used for the absorption layer CF(j).Specifically, a material that transmits red light, green light, or bluelight can be used for the absorption layer CF(j).

For example, a material that emits light with a wavelength longer thanthat of incident light can be used for the color conversion layer CC(j).For example, a material that absorbs blue light or ultraviolet light,converts it into green light, and releases the green light, a materialthat absorbs blue light or ultraviolet light, converts it into redlight, and releases the red light, or a material that absorbsultraviolet light, converts it into blue light, and releases the bluelight can be used for the color conversion layer. Specifically, aquantum dot with a diameter of several nanometers can be used for thecolor conversion layer. Thus, light having a spectrum with a narrow halfwidth can be extracted. Alternatively, light with high saturation can bereleased.

The light-blocking film BM includes an opening portion in a regionoverlapping with the pixel 702(i,j).

For example, a liquid repellent material with respect to a solutioncontaining a material used for the absorption layer CF(j) can be usedfor the insulating film 771. Specifically, a material whose contactangle is more than or equal to 90° with respect to the solution can beused for the insulating film 771. For example, a material containingfluorine, silicon, or the like can be used for the insulating film 771.Thus, the absorption layer CF(j) can be formed by an ink-jet method orthe like. Alternatively, the manufacturing cost of the absorption layerCF(j) can be reduced.

In addition, for example, a liquid repellent material with respect to asolution containing a material used for the color conversion layer CC(j)can be used for the insulating film 771.

<<Functional Film 770P and the Like>>

The functional film 770P includes a region overlapping with the displayelement 550(i,j).

An anti-reflection film, a polarizing film, a retardation film, a lightdiffusion film, a condensing film, or the like can be used as thefunctional film 770P, for example.

For example, an anti-reflection film with a thickness of less than orequal to 1 μm can be used as the functional film 770P. Specifically, astacked-layer film in which three or more layers, preferably five ormore layers, further preferably 15 or more layers of dielectrics arestacked can be used as the functional film 770P. This allows thereflectivity to be as low as 0.5% or less, preferably 0.08% or less.

Specifically, a circularly polarizing film can be used as the functionalfilm 770P.

Furthermore, an antistatic film inhibiting the attachment of a dust, awater repellent film inhibiting the attachment of a stain, anantireflective film (anti-reflection film), a non-glare film (anti-glarefilm), a hard coat film inhibiting generation of a scratch in use, orthe like can be used as the functional film 770P.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

Embodiment 2

In this embodiment, structures of the display panel of one embodiment ofthe present invention will be described with reference to FIG. 3 , FIG.6 , and FIG. 7 .

FIG. 7 shows a structure of the display panel of one embodiment of thepresent invention.

<Structure Example 1 of Display Panel>

The display panel 700 described in this embodiment includes the displayregion 231 (see FIG. 7 ).

<<Structure Example 1 of Display Region 231>>

The display region 231 includes a group of pixels 702(i,1) to 702(i,n),a different group of pixels 702(1,j) to 702(m,j), the scan line G21(i),and the signal line S21(j) (see FIG. 7 ). Note that i is an integergreater than or equal to 1 and less than or equal to m,j is an integergreater than or equal to 1 and less than or equal to n, and m and n areeach an integer greater than or equal to 1.

Although not illustrated, the display region 231 includes a conductivefilm VCOM2 and the conductive film ANO.

The group of pixels 702(1, l) to 702(i,n) are arranged in the rowdirection (the direction indicated by an arrow R1 in the drawing) andinclude the pixel 702(i,j).

The different group of pixels 702(1,j) to 702(m,j) are arranged in thecolumn direction intersecting the row direction (the direction indicatedby an arrow C1 in the drawing) and include the pixel 702(i,j).

The scan line G21(i) is electrically connected to the group of pixels702(i,1) to 702(i,n) arranged in the row direction.

The signal line S21(j) is electrically connected to the different groupof pixels 702(i,j) to 702(m,j) arranged in the column direction.

Thus, image data can be supplied to a plurality of pixels. As a result,a novel display panel that is highly convenient or reliable can beprovided.

<<Structure Example 2 of Display Region 231>>

The display region 231 includes a plurality of pixels in a matrix. Forexample, the display region 231 includes 7600 or more pixels in the rowdirection and 4300 or more pixels in the column direction. Specifically,7680 pixels are provided in the row direction and 4320 pixels areprovided in the column direction.

<<Structure Example 3 of Display Region 231>>

The diagonal size of the display region 231 is greater than or equal to40 inches, preferably greater than or equal to 60 inches, furtherpreferably greater than or equal to 80 inches. The diagonal size of thedisplay region 231 is preferably less than or equal to, for example, 150inches because the weight can be reduced.

Thus, a high-resolution image can be displayed. As a result, a noveldisplay panel that is highly convenient or reliable can be provided.

<<Structure Example 4 of Display Region 231>>

The display region 231 includes a plurality of pixels. The plurality ofpixels have a function of displaying colors with different hues.Alternatively, colors with hues that cannot be displayed by each of theplurality of pixels can be displayed by additive color mixture using theplurality of pixels.

Note that when a plurality of pixels capable of displaying colors withdifferent hues are used for color mixture, each of the pixels can berephrased as a subpixel. In addition, a set of subpixels can berephrased as a pixel.

For example, the pixel 702(i,j) can be rephrased as a subpixel, and aset of the pixel 702(i,j), the pixel 702(i,j+1), and the pixel702(i,j+2) can be rephrased as a pixel 703(i,k) (see FIG. 3(C)).

Specifically, a set of a subpixel that displays blue, a subpixel thatdisplays green, and a subpixel that displays red can be used as thepixel 703(i,k). A set of a subpixel that displays cyan, a subpixel thatdisplays magenta, and a subpixel that displays yellow can be used as thepixel 703(i,k).

Furthermore, the above set to which a subpixel that displays white orthe like is added can be used as the pixel, for example.

<Structure Example 2 of Display Panel>

The display panel 700 described in this embodiment includes one or moredriver circuits. For example, a driver circuit GD and a driver circuitSD can be included (see FIG. 7 ).

<<Driver Circuit GDA and Driver Circuit GDB>>

A driver circuit GDA and a driver circuit GDB can be used as the drivercircuit GD. For example, the driver circuit GDA and the driver circuitGDB each have a function of supplying a selection signal on the basis ofcontrol data.

Specifically, the driver circuit GDA and the driver circuit GDB have afunction of supplying a selection signal to one scan line at a frequencyof 30 Hz or higher, preferably 60 Hz or higher, on the basis of thecontrol data. Accordingly, a moving image can be smoothly displayed.

Alternatively, the driver circuit GDA and the driver circuit GDB have afunction of supplying a selection signal to one scan line at a frequencylower than 30 Hz, preferably lower than 1 Hz, further preferably lessthan once a minute, on the basis of the control data. Accordingly, astill image in which flickering is reduced can be displayed.

In the case where a plurality of driver circuits are provided, forexample, the frequency at which the driver circuit GDA supplies aselection signal and the frequency at which the driver circuit GDBsupplies a selection signal can be made different from each other.Specifically, the selection signal can be supplied at a higher frequencyto a region on which a moving image is displayed than to a region onwhich a still image is displayed. Accordingly, a still image in whichflickering is reduced can be displayed on a region, and a moving imagecan be smoothly displayed on another region.

The frame frequency can be variable. For example, display can beperformed at a frame frequency of higher than or equal to 1 Hz and lowerthan or equal to 120 Hz. Alternatively, display can be performed at aframe frequency of 120 Hz by a progressive method.

A bottom-gate transistor, a top-gate transistor, or the like can be usedin the driver circuit GD, for example. Specifically, a transistor MD canbe used in the driver circuit GD (see FIG. 6 ).

Note that for example, a semiconductor film used for a transistor in thedriver circuit GD can be formed in a process of forming a semiconductorfilm used for a transistor in the pixel circuit 530(i,j).

<<Driver Circuit SD>>

The driver circuit SD has a function of generating an image signal onthe basis of data V11 and a function of supplying the image signal to apixel circuit electrically connected to one display element (see FIG. 7).

A variety of sequential circuits or the like, such as a shift register,can be used as the driver circuit SD, for example.

For example, an integrated circuit formed on a silicon substrate can beused as the driver circuit SD.

An integrated circuit can be connected to a terminal by a COG (Chip onglass) method or a COF (Chip on Film) method, for example. Specifically,an anisotropic conductive film can be used to connect an integratedcircuit to a terminal.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

Embodiment 3

In this embodiment, a structure of a display device of one embodiment ofthe present invention will be described with reference to FIG. 8 .

FIG. 8 shows the structure of the display device of one embodiment ofthe present invention. FIG. 8(A) is a block diagram of the displaydevice of one embodiment of the present invention, and FIG. 8 (B-1) toFIG. 8 (B-3) are projection views illustrating the appearance of thedisplay device of one embodiment of the present invention.

<Structure Example of Display Device>

The display device described in this embodiment includes a controlportion 238 and the display panel 700 (see FIG. 8(A)).

<<Structure Example 1 of Control Portion 238>>

The control portion 238 is supplied with image data V1 and control dataCI. For example, a clock signal, a timing signal, or the like can beused as the control data CI.

The control portion 238 generates the data V11 on the basis of the imagedata V1 and generates a control signal SP on the basis of the controldata CI. Furthermore, the control portion 238 supplies the data V11 andthe control signal SP.

The data V11 includes a grayscale of 8 bits or more, preferably 12 bitsor more, for example. In addition, a clock signal, a start pulse, or thelike of a shift register used for a driver circuit can be used as thecontrol signal SP, for example.

<Structure Example 2 of Control Portion 238>

For example, a decompression circuit 234 and an image processing circuit235 can be used for the control portion 238.

<<Decompression Circuit 234>>

The decompression circuit 234 has a function of decompressing the imagedata V1 supplied in a compressed state. The decompression circuit 234includes a memory portion. The memory portion has a function of storingdecompressed image data, for example.

<<Image Processing Circuit 235>>

The image processing circuit 235 includes a memory region, for example.The memory region has a function of storing data included in the imagedata V1, for example.

The image processing circuit 235 has a function of generating the dataV11 by correcting the image data V1 on the basis of a predeterminedcharacteristic curve and a function of supplying the data V11, forexample.

<<Structure Example 1 of Display Panel>>

The display panel 700 is supplied with the data V11 and the controlsignal SP. For example, a driver circuit can be used for the displaypanel 700. Specifically, the display panel 700 described in Embodiment 2can be used.

<<Driver Circuit>>

The driver circuit operates on the basis of the control signal SP. Usingthe control signal SP enables a synchronized operation of a plurality ofdriver circuits.

For example, a driver circuit GDA(1), a driver circuit GDA(2), a drivercircuit GDB(1), and a driver circuit GDB(2) can be used for the displaypanel. The driver circuit GDA(1), the driver circuit GDA(2), the drivercircuit GDB(1), and the driver circuit GDB(2) are supplied with thecontrol signal SP and have a function of supplying a selection signal.

For example, a driver circuit SDA(1), a driver circuit SDA(2), a drivercircuit SDB(1), a driver circuit SDB(2), a driver circuit SDC(1), and adriver circuit SDC(2) can be used for the display panel. The drivercircuit SDA(1), the driver circuit SDA(2), the driver circuit SDB(1),the driver circuit SDB(2), the driver circuit SDC(1), and the drivercircuit SDC(2) are supplied with the control signal SP and the data V11and capable of supplying an image signal.

<<Structure Example 3 of Pixel 702(i,j)>>

The pixel 702(i,j) performs display on the basis of the data V11.

Thus, the image data can be displayed using the display element. As aresult, a novel display device that is highly convenient or reliable canbe provided. Alternatively, for example, a television receiver system(see FIG. 8 (B-1)), a video monitor (see FIG. 8 (B-2)), a laptopcomputer (see FIG. 8 (B-3)), or the like can be provided.

<<Structure Example 2 of Display Panel>>

For example, a control circuit 233 can be used in the display panel 700.Specifically, the control circuit 233 formed over a rigid substrate canbe used for the display panel 700. The control circuit 233 formed over arigid substrate can be electrically connected to the control portion 238using a flexible printed board.

<<Control Circuit 233>>

The control circuit 233 has a function of generating and supplying thecontrol signal SP. For example, a clock signal, a timing signal, or thelike can be used as the control signal SP. Specifically, a timingcontroller can be used as the control circuit 233.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

Embodiment 4

In this embodiment, a structure of an input/output device of oneembodiment of the present invention will be described with reference toFIG. 9 .

FIG. 9 is a block diagram illustrating the structure of the input/outputdevice of one embodiment of the present invention.

<Structure Example of Input/Output Device>

The input/output device described in this embodiment includes an inputportion 240 and a display portion 230 (see FIG. 9 ).

<<Display Portion 230>>

The display portion 230 includes a display panel. For example, thedisplay panel 700 described in Embodiment 1 or Embodiment 2 can be usedfor the display portion 230. Note that a structure including the inputportion 240 and the display portion 230 can be referred to as aninput/output panel 700TP.

<<Structure Example 1 of Input Portion 240>>

The input portion 240 includes a sensing region 241. The input portion240 has a function of sensing an object approaching the sensing region241.

The sensing region 241 includes a region overlapping with the pixel702(i,j).

Thus, the object approaching the region overlapping with the displayportion can be sensed while image data is displayed by the displayportion. Alternatively, a finger or the like that approaches the displayportion can be used as a pointer to input positional data.Alternatively, positional data can be associated with image datadisplayed on the display portion. As a result, a novel input/outputdevice that is highly convenient or reliable can be provided.

<<Structure Example 2 of Input Portion 240>>

The input portion 240 includes an oscillation circuit OSC and a sensingcircuit DC (see FIG. 9 ).

<<Sensing Region 241>>

The sensing region 241 includes one or more sensing elements, forexample.

The sensing region 241 includes a group of sensing elements 775(g,1) to775(g,q) and a different group of sensing elements 775(1,h) to 775(p,h).Note that g is an integer greater than or equal to 1 and less than orequal to p, h is an integer greater than or equal to 1 and less than orequal to q, and p and q are each an integer greater than or equal to 1.

The group of sensing elements 775(g,1) to 775(g,q) include a sensingelement 775(g,h) and are arranged in the row direction (the directionindicated by an arrow R2 in the drawing). Note that the directionindicated by the arrow R2 may be the same as or different from thedirection indicated by the arrow R1.

The different group of sensing elements 775(1,h) to 775(p,h) include thesensing element 775(g,h) and are arranged in the column direction (thedirection indicated by an arrow C2 in the drawing) that intersects therow direction.

<<Sensing Element>>

The sensing element has a function of sensing an approaching pointer.For example, a finger, a stylus pen, or the like can be used as thepointer. For example, a piece of metal, a coil, or the like can be usedfor the stylus pen.

Specifically, a capacitive proximity sensor, an electromagneticinductive proximity sensor, an optical proximity sensor, a resistiveproximity sensor, or the like can be used as the sensing element.

A plurality of types of sensing elements can be used in combination. Forexample, a sensing element that senses a finger and a sensing elementthat senses a stylus pen can be used in combination.

This allows determination of the kind of a pointer. Alternatively,different instructions can be associated with pieces of sensing datadepending on the kind of a pointer that has been determined.Specifically, in the case where it is determined that a finger is usedas a pointer, sensing data can be associated with a gesture.Alternatively, in the case where it is determined that a stylus pen isused as a pointer, sensing data can be associated with drawingprocessing.

Specifically, a capacitive proximity sensor or an optical proximitysensor can be used to sense a finger. Alternatively, an electromagneticinductive proximity sensor or an optical proximity sensor can be used tosense a stylus pen.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

Embodiment 5

In this embodiment, structures of a data processing device of oneembodiment of the present invention will be described with reference toFIG. 10 to FIG. 12 .

FIG. 10(A) is a block diagram illustrating the structure of the dataprocessing device of one embodiment of the present invention. FIG. 10(B)and FIG. 10(C) are projection views illustrating examples of theappearance of the data processing device.

FIG. 11 is a flow chart illustrating a program of one embodiment of thepresent invention. FIG. 11(A) is a flow chart illustrating mainprocessing of the program of one embodiment of the present invention,and FIG. 11(B) is a flow chart illustrating interrupt processing.

FIG. 12 shows a program of one embodiment of the present invention. FIG.12(A) is a flow chart illustrating interrupt processing of the programof one embodiment of the present invention. FIG. 12(B) is a schematicview illustrating operation of the data processing device, and FIG.12(C) is a timing chart illustrating operation of the data processingdevice of one embodiment of the present invention. Note that 1Frame inthe drawing represents one frame, and Time written with an arrowrepresents a lapse of time.

<Structure Example 1 of Data Processing Device>

A data processing device described in this embodiment includes anarithmetic device 210 and an input/output device 220 (see FIG. 10(A)).Note that the input/output device is electrically connected to thearithmetic device 210. A data processing device 200 can also include ahousing (see FIG. 10(B) or FIG. 10(C)).

<<Structure Example 1 of Arithmetic Device 210>>

The arithmetic device 210 is supplied with input data II or sensing dataDS. The arithmetic device 210 generates the control data CI and theimage data VI on the basis of the input data II or the sensing data DSand supplies the control data CI and the image data V1.

The arithmetic device 210 includes an arithmetic portion 211 and amemory portion 212. The arithmetic device 210 includes a transmissionpath 214 and an input/output interface 215.

The transmission path 214 is electrically connected to the arithmeticportion 211, the memory portion 212, and the input/output interface 215.

<<Arithmetic Portion 211>>

The arithmetic portion 211 has a function of executing a program, forexample.

<<Memory Portion 212>>

The memory portion 212 has a function of storing, for example, theprogram executed by the arithmetic portion 211, initial data, settingdata, an image, or the like.

Specifically, a hard disk, a flash memory, a memory using a transistorincluding an oxide semiconductor, or the like can be used.

<<Input/Output Interface 215 and Transmission Path 214>>

The input/output interface 215 includes a terminal or a wiring and has afunction of supplying data and being supplied with data. Theinput/output interface 215 can be electrically connected to thetransmission path 214, for example. The input/output interface 215 canalso be electrically connected to the input/output device 220.

The transmission path 214 includes a wiring and has a function ofsupplying data and being supplied with data. The transmission path 214can be electrically connected to the input/output interface 215, forexample. The transmission path 214 can also be electrically connected tothe arithmetic portion 211, the memory portion 212, or the input/outputinterface 215.

<<Structure Example of Input/Output Device 220>>

The input/output device 220 supplies the input data II and the sensingdata DS. The input/output device 220 is supplied with the control dataCI and the image data V1 (see FIG. 10(A)).

As the input data II, for example, a scan code of a keyboard, positionaldata, operation data of buttons, sound data, image data, or the like canbe used. Alternatively, for example, illuminance data, attitude data,acceleration data, bearing data, pressure data, temperature data,humidity data, or the like of an environment where the data processingdevice 200 is used, or the like can be used as the sensing data DS.

As the control data CI, for example, a signal controlling the luminanceof display of the image data V1, a signal controlling the colorsaturation, or a signal controlling the hue can be used. Alternatively,a signal that changes display of part of the image data V1 can be usedas the control data CI.

The input/output device 220 includes the display portion 230, the inputportion 240, and a sensing portion 250. For example, the input/outputdevice described in Embodiment 4 can be used.

<<Structure Example of Display Portion 230>>

The display portion 230 displays the image data V1 on the basis of thecontrol data CI.

The display portion 230 includes the control portion 238, the drivercircuit GD, the driver circuit SD, and the display panel 700 (see FIG. 8). For example, the display device described in Embodiment 3 can be usedfor the display portion 230.

<<Structure Example of Input Portion 240>>

The input portion 240 generates the input data II. For example, theinput portion 240 has a function of supplying positional data P1.

For example, a human interface or the like can be used for the inputportion 240 (see FIG. 10(A)). Specifically, a keyboard, a mouse, a touchsensor, a microphone, a camera, or the like can be used as the inputportion 240.

Moreover, a touch sensor including a region overlapping with the displayportion 230 can be used. Note that an input/output device including thedisplay portion 230 and a touch sensor including a region overlappingwith the display portion 230 can be referred to as a touch panel or atouch screen.

A user can make various gestures (tap, drag, swipe, pinch in, and thelike) using his/her finger touching the touch panel as a pointer, forexample.

The arithmetic device 210, for example, analyzes data on the position,path, or the like of the finger in contact with the touch panel and candetermine that a predetermined gesture is supplied when the analysisresults meet predetermined conditions. Thus, the user can supply apredetermined operation instruction associated with the predeterminedgesture in advance by using the gesture.

For instance, the user can supply a “scroll instruction” for changingthe display position of image data by using a gesture of moving thefinger in contact with the touch panel along the touch panel.

<<Structure Example of Sensing Portion 250>>

The sensing portion 250 generates the sensing data DS. The sensingportion 250 has a function of sensing the illuminance of the environmentwhere the data processing device 200 is used and a function of supplyingilluminance data, for example.

The sensing portion 250 has a function of sensing the ambient conditionsand supplying the sensing data. Specifically, the sensing portion 250can supply illuminance data, attitude data, acceleration data, bearingdata, pressure data, temperature data, humidity data, or the like.

For example, a photosensor, an attitude sensor, an acceleration sensor,a direction sensor, a GPS (Global positioning System) signal receivingcircuit, a pressure sensor, a temperature sensor, a humidity sensor, acamera, or the like can be used as the sensing portion 250.

<<Communication Portion 290>>

A communication portion 290 has a function of supplying data to anetwork and obtaining data from the network.

<<Housing>>

Note that the housing has a function of storing the input/output device220 or the arithmetic device 210. Alternatively, the housing has afunction of supporting the display portion 230 or the arithmetic device210.

Thus, the control data can be generated on the basis of the input dataor the sensing data. Alternatively, the image data can be displayed onthe basis of the input data or the sensing data. Alternatively, the dataprocessing device can determine the intensity of light received by thehousing of the data processing device and operate under the environmentwhere the data processing device is used. Alternatively, a user of thedata processing device can select a display method. As a result, a noveldata processing device that is highly convenient or reliable can beprovided.

Note that in some cases, these components cannot be clearlydistinguished from each other and one component may also serve asanother component or include part of another component. For example, atouch panel in which a touch sensor overlaps with a display panel is aninput portion as well as a display portion.

<<Structure Example 2 of Arithmetic Device 210>>

The arithmetic device 210 includes an artificial intelligence portion213 (see FIG. 10(A)). The artificial intelligence portion 213 generatesthe control data CI on the basis of the input data II or the sensingdata DS.

[Natural Language Processing on Input Data II]

Specifically, the artificial intelligence portion 213 can performnatural language processing on the input data II to extract one featurefrom the whole input data II. For example, the artificial intelligenceportion 213 can infer emotion or the like put in the input data II,which can be a feature. The artificial intelligence portion 213 caninfer the color, design, font, or the like empirically felt suitable forthe feature. The artificial intelligence portion 213 can generate dataspecifying the color, design, or font of a letter or data specifying thecolor or design of the background, and the data can be used as thecontrol data CI.

Specifically, the artificial intelligence portion 213 can performnatural language processing on the input data II to extract some wordsincluded in the input data II. For example, the artificial intelligenceportion 213 can extract expressions including a grammatical error, afactual error, emotion, and the like. The artificial intelligenceportion 213 can generate the control data CI for display of extractedpart in the color, design, font, or the like different from those ofanother part, and the data can be used as the control data CI.

[Image Processing on Input Data II]

Specifically, the artificial intelligence portion 213 can perform imageprocessing on the input data II to extract one feature from the inputdata II. For example, the artificial intelligence portion 213 can inferthe age where an image of the input data II is taken, whether the imageis taken indoors or outdoors, whether the image is taken in the daytimeor at night, or the like, which can be a feature. The artificialintelligence portion 213 can infer the color tone empirically feltsuitable for the feature and generate the control data CI for use of thecolor tone for display. Specifically, data specifying color (e.g., fullcolor, monochrome, or sepia) used for expression of a gradation can beused as the control data CI.

Specifically, the artificial intelligence portion 213 can perform imageprocessing on the input data II to extract some images included in theinput data II. For example, the artificial intelligence portion 213 cangenerate the control data CI for display of a boundary between extractedpart of the image and another part. Specifically, the artificialintelligence portion 213 can generate the control data CI for display ofa rectangle surrounding the extracted part of the image.

[Inference Using Sensing Data DS]

Specifically, the artificial intelligence portion 213 can generate aninference using the sensing data DS. Alternatively, the artificialintelligence portion 213 can generate the control data CI on the basisof inference RI so that the user of the data processing device 200 canfeel comfortable.

Specifically, the artificial intelligence portion 213 can generate thecontrol data CI for adjustment of display brightness on the basis of theambient illuminance or the like so that the display brightness can befelt comfortable. Alternatively, the artificial intelligence portion 213can generate the control data CI for adjustment of volume on the basisof the ambient noise or the like so that the volume can be feltcomfortable.

As the control data CI, a clock signal, a timing signal, or the likethat is supplied to the control portion 238 included in the displayportion 230 can be used. Alternatively, a clock signal, a timing signal,or the like that is supplied to a control portion 248 included in theinput portion 240 can be used as the control data CI.

<Structure Example 2 of Data Processing Device>

Another structure of the data processing device of one embodiment of thepresent invention is described with reference to FIG. 11(A) and FIG.11(B).

<<Program>>

A program of one embodiment of the present invention has the followingsteps (see FIG. 11(A)).

[First Step]

In a first step, setting is initialized (see FIG. 11(A)(S1)).

For example, predetermined image data which is to be displayed onstart-up and data for determining a predetermined mode of displaying theimage data and a predetermined display method for displaying the imagedata are acquired from the memory portion 212. Specifically, one stillimage data or another moving image data can be used as the predeterminedimage data. Furthermore, a first mode or a second mode can be used asthe predetermined mode.

[Second Step]

In a second step, interrupt processing is allowed (see FIG. 11(A)(S2)).Note that an arithmetic device allowed to execute the interruptprocessing can perform the interrupt processing in parallel with themain processing. The arithmetic device that has returned from theinterrupt processing to the main processing can reflect the resultsobtained through the interrupt processing in the main processing.

The arithmetic device may execute the interrupt processing when acounter has an initial value, and the counter may be set at a valueother than the initial value when the arithmetic device returns from theinterrupt processing. Thus, the interrupt processing can always followthe start-up of the program.

[Third Step]

In a third step, image data is displayed by a predetermined mode or apredetermined display method selected in the first step or the interruptprocessing (see FIG. 11(A)(S3)). Note that the predetermined modedetermines a mode of displaying the data, and the predetermined displaymethod determines a method for displaying the image data. For example,the image data V1 can be used as data to be displayed.

One method for displaying the image data V1 can be associated with thefirst mode, for example. Alternatively, another method for displayingthe image data V1 can be associated with the second mode. Thus, adisplay method can be selected on the basis of the selected mode.

<<First Mode>>

Specifically, a method for supplying selection signals to a scan line ata frequency of 30 Hz or higher, preferably 60 Hz or higher, andperforming display on the basis of the selection signals can beassociated with the first mode.

For example, when selection signals are supplied at a frequency of 30 Hzor higher, preferably 60 Hz or higher, the movement of a moving imagecan be smoothly displayed.

For example, when an image is refreshed at a frequency of 30 Hz orhigher, preferably 60 Hz or higher, an image that changes so as tosmoothly follow the user's operation can be displayed on the dataprocessing device 200 which is being operated by the user.

<<Second Mode>>

Specifically, a method for supplying selection signals to a scan line ata frequency lower than 30 Hz, preferably lower than 1 Hz, furtherpreferably less than once a minute, and performing display on the basisof the selection signals can be associated with the second mode.

The supply of selection signals at a frequency lower than 30 Hz,preferably lower than 1 Hz, further preferably less than once a minuteenables display with a flicker or flickering suppressed. Furthermore,the power consumption can be reduced.

For example, when the data processing device 200 is used for a clock,the display can be refreshed at a frequency of once a second, once aminute, or the like.

Note that when a light-emitting element is used as the display element,for example, the light-emitting element can be made to emit light in apulsed manner so that image data is displayed. Specifically, an organicEL element can be made to emit light in a pulsed manner, and itsafterglow can be used for display. The organic EL element has excellentfrequency characteristics; thus, time for driving the light-emittingelement can be shortened, and thus the power consumption can be reducedin some cases. Alternatively, heat generation is inhibited; thus, thedeterioration of the light-emitting element can be suppressed in somecases.

[Fourth Step]

In a fourth step, selection is performed such that the program proceedsto a fifth step when a termination instruction has been supplied,whereas the program proceeds to the third step when the terminationinstruction has not been supplied (see FIG. 11(A)(S4)).

For example, the termination instruction supplied in the interruptprocessing may be used for the determination.

[Fifth Step]

In the fifth step, the program terminates (see FIG. 11(A)(S5)).

<<Interrupt Processing>>

The interrupt processing includes a sixth step to an eighth stepdescribed below (see FIG. 11(B)).

[Sixth Step]

In the sixth step, the illuminance of the environment where the dataprocessing device 200 is used is sensed using the sensing portion 250,for example (see FIG. 11(B)(S6)). Note that color temperature orchromaticity of ambient light may be sensed instead of the illuminanceof the environment.

[Seventh Step]

In the seventh step, a display method is determined on the basis of thesensed illuminance data (see FIG. 11(B)(S7)). For example, a displaymethod is determined such that the brightness of display is not too darkor too bright.

Note that in the case where the color temperature of the ambient lightor the chromaticity of the ambient light is sensed in the sixth step,the color of display may be adjusted.

[Eighth Step]

In the eighth step, the interrupt processing terminates (see FIG.11(B)(S8)).

<Structure Example 3 of Data Processing Device>

Another structure of the data processing device of one embodiment of thepresent invention is described with reference to FIG. 12 .

FIG. 12(A) is a flow chart illustrating a program of one embodiment ofthe present invention. FIG. 12(A) is a flow chart illustrating interruptprocessing different from the interrupt processing shown in FIG. 11(B).

Note that the structure example 3 of the data processing device isdifferent from the interrupt processing described with reference to FIG.11(B) in that the interrupt processing includes a step of changing amode on the basis of a supplied predetermined event. Different portionswill be described in detail here, and refer to the above description forportions that can use similar structures.

<<Interrupt Processing>>

The interrupt processing includes a sixth step to an eighth stepdescribed below (see FIG. 12(A)).

[Sixth Step]

In the sixth step, the program proceeds to the seventh step when apredetermined event has been supplied, whereas the program proceeds tothe eighth step when the predetermined event has not been supplied (seeFIG. 12(A)(U6)). For example, whether the predetermined event issupplied in a predetermined period or not can be used as a condition.Specifically, the predetermined period can be longer than 0 seconds, andshorter than or equal to 5 seconds, shorter than or equal to 1 second,or shorter than or equal to 0.5 seconds, preferably shorter than orequal to 0.1 seconds.

[Seventh Step]

In the seventh step, the mode is changed (see FIG. 12(A)(U7)).Specifically, the second mode is selected in the case where the firstmode has been selected, and the first mode is selected in the case wherethe second mode has been selected.

For example, it is possible to change the display mode of a region thatis part of the display portion 230. Specifically, the display mode of aregion where one driver circuit in the display portion 230 including thedriver circuit GDA, the driver circuit GDB, and a driver circuit GDCsupplies a selection signal can be changed (see FIG. 12(B)).

For example, the display mode of the region where a selection signal issupplied from the driver circuit GDB can be changed when a predeterminedevent is supplied to the input portion 240 in a region overlapping withthe region where a selection signal is supplied from the driver circuitGDB (see FIG. 12(B) and FIG. 12(C)). Specifically, the frequency ofsupply of the selection signal from the driver circuit GDB can bechanged in accordance with a “tap” event supplied to a touch panel witha finger or the like.

A signal GCLK is a clock signal controlling the operation of the drivercircuit GDB, and a signal PWC1 and a signal PWC2 are pulse width controlsignals controlling the operation of the driver circuit GDB. The drivercircuit GDB supplies selection signals to a scan line G21(m+1) to a scanline G21(2 m) on the basis of the signal GCLK, the signal PWC1, thesignal PWC2, and the like.

Thus, for example, the driver circuit GDB can supply a selection signalwithout supply of selection signals from the driver circuit GDA and thedriver circuit GDC. Alternatively, the display of the region where aselection signal is supplied from the driver circuit GDB can berefreshed without any change in the display of regions where selectionsignals are supplied from the driver circuit GDA and the driver circuitGDC. Alternatively, power consumed by the driver circuits can bereduced.

[Eighth Step]

In the eighth step, the interrupt processing terminates (see FIG.12(A)(U8)). Note that in a period in which the main processing isexecuted, the interrupt processing may be repeatedly executed.

<<Predetermined Event>>

For example, it is possible to use events supplied using a pointingdevice such as a mouse, such as “click” and “drag”, and events suppliedto a touch panel with a finger or the like used as a pointer, such as“tap”, “drag”, and “swipe”.

For example, the position of a slide bar pointed by a pointer, the swipespeed, and the drag speed can be used to assign arguments to aninstruction associated with a predetermined event.

For example, data sensed by the sensing portion 250 is compared with apredetermined threshold value, and the compared results can be used forthe event.

Specifically, a pressure sensor or the like in contact with a button orthe like that is arranged so as to be pushed in a housing can be usedfor the sensing portion 250.

<<Instruction Associated with Predetermined Event>>

For example, the termination instruction can be associated with apredetermined event.

For example, “page-turning instruction” for switching display from onedisplayed image data to another image data can be associated with apredetermined event. Note that an argument determining the page-turningspeed or the like, which is used when the “page-turning instruction” isexecuted, can be supplied using the predetermined event.

For example, “scroll instruction” for moving the display position ofdisplayed part of image data and displaying another part continuing fromthat part, or the like can be associated with a predetermined event.Note that an argument determining the moving speed of display, or thelike, which is used when the “scroll instruction” is executed, can besupplied using the predetermined event.

For example, an instruction for setting the display method, aninstruction for generating image data, or the like can be associatedwith a predetermined event. Note that an argument determining thebrightness of a generated image can be associated with a predeterminedevent. An argument determining the brightness of a generated image maybe determined on the basis of ambient brightness sensed by the sensingportion 250.

For example, an instruction for acquiring data distributed via a pushservice using the communication portion 290 or the like can beassociated with a predetermined event.

Note that positional data sensed by the sensing portion 250 may be usedfor the determination of the presence or absence of a qualification foracquiring data. Specifically, it may be determined that there is aqualification for acquiring data in the case of presence in apredetermined class room, school, conference room, company, building, orthe like or in a predetermined region. Thus, for example, educationalmaterials distributed in a classroom of a school, a university, or thelike can be received, so that the data processing device 200 can be usedas a schoolbook or the like (see FIG. 10(C)). Alternatively, materialsdistributed in a conference room in, for example, a company can bereceived and used for a conference material.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

Embodiment 6

In this embodiment, structures of a data processing device of oneembodiment of the present invention are described with reference to FIG.13 and FIG. 14 .

FIG. 13 and FIG. 14 show structures of the data processing device of oneembodiment of the present invention. FIG. 13(A) is a block diagram ofthe data processing device, and FIG. 13(B) to FIG. 13(E) are perspectiveviews illustrating structures of the data processing device. FIG. 14(A)to FIG. 14(E) are perspective views illustrating structures of the dataprocessing device.

<Data Processing Device>

A data processing device 5200B described in this embodiment includes anarithmetic device 5210 and an input/output device 5220 (see FIG. 13(A)).

The arithmetic device 5210 has a function of being supplied withoperation data and a function of supplying image data on the basis ofthe operation data.

The input/output device 5220 includes a display portion 5230, an inputportion 5240, a sensing portion 5250, and a communication portion 5290and has a function of supplying operation data and a function of beingsupplied with image data. The input/output device 5220 also has afunction of supplying sensing data, a function of supplyingcommunication data, and a function of being supplied with communicationdata.

The input portion 5240 has a function of supplying operation data. Forexample, the input portion 5240 supplies operation data on the basis ofoperation by a user of the data processing device 5200B.

Specifically, a keyboard, a hardware button, a pointing device, a touchsensor, an illuminance sensor, an imaging device, an audio input device,an eye-gaze input device, an attitude sensing device, or the like can beused as the input portion 5240.

The display portion 5230 includes a display panel and has a function ofdisplaying image data. For example, the display panel described inEmbodiment 1 or Embodiment 2 can be used for the display portion 5230.

The sensing portion 5250 has a function of supplying sensing data. Forexample, the sensing portion 5250 has a function of sensing asurrounding environment where the data processing device is used andsupplying sensing data.

Specifically, an illuminance sensor, an imaging device, an attitudesensing device, a pressure sensor, a human motion sensor, or the likecan be used as the sensing portion 5250.

The communication portion 5290 has a function of being supplied withcommunication data and a function of supplying communication data. Forexample, the communication portion 5290 has a function of beingconnected to another electronic device or a communication networkthrough wireless communication or wired communication. Specifically, thecommunication portion 5290 has a function of wireless local area networkcommunication, telephone communication, or near field communication, forexample.

<<Structure Example 1 of Data Processing Device>>

For example, the display portion 5230 can have an outer shape along acylindrical column or the like (see FIG. 13(B)). The data processingdevice has a function of changing its display method in accordance withthe illuminance of a usage environment. In addition, the data processingdevice has a function of changing the displayed content in response tosensed existence of a person. This allows the data processing device tobe provided on a column of a building, for example. The data processingdevice can display advertising, guidance, or the like. The dataprocessing device can be used for digital signage or the like.

<<Structure Example 2 of Data Processing Device>>

For example, the data processing device has a function of generatingimage data on the basis of the path of a pointer used by a user (seeFIG. 13(C)). Specifically, the display panel with a diagonal size of 20inches or longer, preferably 40 inches or longer, further preferably 55inches or longer can be used. Alternatively, a plurality of displaypanels can be arranged and used as one display region. Alternatively, aplurality of display panels can be arranged and used as a multiscreen.Thus, the data processing device can be used for an electronicblackboard, an electronic bulletin board, or digital signage, forexample.

<<Structure Example 3 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 13(D)). Thus, for example, the power consumption of asmartwatch can be reduced. Alternatively, for example, a smartwatch candisplay an image so as to be suitably used even in an environment understrong external light, e.g., outdoors in fine weather.

<<Structure Example 4 of Data Processing Device>>

For example, the display portion 5230 has a surface gently curved alonga side surface of a housing (see FIG. 13(E)). The display portion 5230includes a display panel that has a function of displaying an image onthe front surface, the side surfaces, and the top surface, for example.Thus, for example, a mobile phone can display image data not only on itsfront surface but also on its side surfaces and top surface.

<<Structure Example 5 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 14(A)). Thus, the power consumption of a smartphone can bereduced. Alternatively, for example, a smartphone can display an imageso as to be suitably used even in an environment under strong externallight, e.g., outdoors in fine weather.

<<Structure Example 6 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 14(B)). Accordingly, a television system can display an imagein such a manner that the television system can be suitably used evenwhen irradiated with strong external light that enters the room from theoutside in fine weather.

<<Structure Example 7 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 14(C)). Thus, for example, a tablet computer can display animage so as to be suitably used even in an environment under strongexternal light, e.g., outdoors in fine weather.

<<Structure Example 8 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 14(D)). Accordingly, for example, a digital camera can displaya subject in such a manner that an image is favorably viewed even in anenvironment under strong external light, e.g., outdoors in fine weather.

<<Structure Example 9 of Data Processing Device>>

For example, the data processing device has a function of changing itsdisplay method in accordance with the illuminance of a usage environment(see FIG. 14(E)). Accordingly, for example, a personal computer candisplay an image so as to be suitably used even in an environment understrong external light, e.g., outdoors in fine weather.

Note that this embodiment can be combined with other embodiments in thisspecification as appropriate.

In the case where there is an explicit description, X and Y areconnected, in this specification and the like, for example, the casewhere X and Y are electrically connected, the case where X and Y arefunctionally connected, and the case where X and Y are directlyconnected are disclosed in this specification and the like. Accordingly,without being limited to a predetermined connection relation, forexample, a connection relation shown in drawings or text, a connectionrelation other than one shown in drawings or text is regarded as beingdisclosed in the drawings or the text.

Here, X and Y each denote an object (e.g., a device, an element, acircuit, a wiring, an electrode, a terminal, a conductive film, or alayer).

Examples of the case where X and Y are directly connected include thecase where an element that allows an electrical connection between X andY (e.g., a switch, a transistor, a capacitor, an inductor, a resistor, adiode, a display element, a light-emitting element, and a load) is notconnected between X and Y, and the case where X and Y are connectedwithout the element that allows the electrical connection between X andY (e.g., a switch, a transistor, a capacitor, an inductor, a resistor, adiode, a display element, a light-emitting element, and a load) providedtherebetween.

An example of the case where X and Y are electrically connected is thecase where one or more elements that allow an electrical connectionbetween X and Y (e.g., a switch, a transistor, a capacitor, an inductor,a resistor, a diode, a display element, a light-emitting element, and aload) can be connected between X and Y. Note that a switch has afunction of being controlled to be turned on or off. That is, a switchhas a function of being in a conducting state (on state) or anon-conducting state (off state) to control whether or not currentflows. Alternatively, the switch has a function of selecting andchanging a current path. Note that the case where X and Y areelectrically connected includes the case where X and Y are directlyconnected.

An example of the case where X and Y are functionally connected is thecase where one or more circuits that allow a functional connectionbetween X and Y (for example, a logic circuit (an inverter, a NANDcircuit, a NOR circuit, or the like), a signal converter circuit (a DAconverter circuit, an AD converter circuit, a gamma correction circuit,or the like), a potential level converter circuit (a power supplycircuit (for example, a step-up circuit, a step-down circuit, or thelike), a level shifter circuit for changing the potential level of asignal, or the like), a voltage source, a current source, a switchingcircuit, an amplifier circuit (a circuit capable of increasing signalamplitude, the amount of current, or the like, an operational amplifier,a differential amplifier circuit, a source follower circuit, a buffercircuit, or the like), a signal generator circuit, a memory circuit, acontrol circuit, or the like) can be connected between X and Y. Forexample, even when another circuit is interposed between X and Y, X andY are functionally connected when a signal output from X is transmittedto Y. Note that the case where X and Y are functionally connectedincludes the case where X and Y are directly connected and the casewhere X and Y are electrically connected.

Note that in the case where there is an explicit description, X and Yare electrically connected, the case where X and Y are electricallyconnected (i.e., the case where X and Y are connected with anotherelement or another circuit interposed therebetween), the case where Xand Y are functionally connected (i.e., the case where X and Y arefunctionally connected with another circuit interposed therebetween),and the case where X and Y are directly connected (i.e., the case whereX and Y are connected without another element or another circuitinterposed therebetween) are disclosed in this specification and thelike. That is, in the case where there is an explicit description, beingelectrically connected, the same contents as the case where there isonly an explicit description, being connected, are disclosed in thisspecification and the like.

Note that, for example, the case where a source (or a first terminal orthe like) of a transistor is electrically connected to X through (or notthrough) Z1 and a drain (or a second terminal or the like) of thetransistor is electrically connected to Y through (or not through) Z2,or the case where a source (or a first terminal or the like) of atransistor is directly connected to one part of Z1 and another part ofZ1 is directly connected to X while a drain (or a second terminal or thelike) of the transistor is directly connected to one part of Z2 andanother part of Z2 is directly connected to Y can be expressed asfollows.

Examples of the expressions include “X, Y, a source (or a first terminalor the like) of a transistor, and a drain (or a second terminal or thelike) of the transistor are electrically connected to each other, and X,the source (or the first terminal or the like) of the transistor, thedrain (or the second terminal or the like) of the transistor, and Y areelectrically connected in this order”, “a source (or a first terminal orthe like) of a transistor is electrically connected to X, a drain (or asecond terminal or the like) of the transistor is electrically connectedto Y, and X, the source (or the first terminal or the like) of thetransistor, the drain (or the second terminal or the like) of thetransistor, and Y are electrically connected in this order”, and “X iselectrically connected to Y through a source (or a first terminal or thelike) and a drain (or a second terminal or the like) of a transistor,and X, the source (or the first terminal or the like) of the transistor,the drain (or the second terminal or the like) of the transistor, and Yare provided in this connection order”. When the connection order in acircuit configuration is defined by an expression similar to the aboveexamples, a source (or a first terminal or the like) and a drain (or asecond terminal or the like) of a transistor can be distinguished fromeach other to specify the technical scope.

Other examples of the expressions include “a source (or a first terminalor the like) of a transistor is electrically connected to X through atleast a first connection path, the first connection path does notinclude a second connection path, the second connection path is a paththrough the transistor and between the source (or the first terminal orthe like) of the transistor and a drain (or a second terminal or thelike) of the transistor, the first connection path is a path through Z1,the drain (or the second terminal or the like) of the transistor iselectrically connected to Y through at least a third connection path,the third connection path does not include the second connection path,and the third connection path is a path through Z2” and “a source (or afirst terminal or the like) of a transistor is electrically connected toX through Z1 by at least a first connection path, the first connectionpath does not include a second connection path, the second connectionpath includes a connection path through the transistor, a drain (or asecond terminal or the like) of the transistor is electrically connectedto Y through Z2 by at least a third connection path, and the thirdconnection path does not include the second connection path”. Stillanother example of the expression is “a source (or a first terminal orthe like) of a transistor is electrically connected to X through Z1 byat least a first electrical path, the first electrical path does notinclude a second electrical path, the second electrical path is anelectrical path from the source (or the first terminal or the like) ofthe transistor to a drain (or a second terminal or the like) of thetransistor, the drain (or the second terminal or the like) of thetransistor is electrically connected to Y through Z2 by at least a thirdelectrical path, the third electrical path does not include a fourthelectrical path, and the fourth electrical path is an electrical pathfrom the drain (or the second terminal or the like) of the transistor tothe source (or the first terminal or the like) of the transistor”. Whenthe connection path in a circuit configuration is defined by anexpression similar to the above examples, a source (or a first terminalor the like) and a drain (or a second terminal or the like) of atransistor can be distinguished from each other to specify the technicalscope.

Note that these expressions are examples and the expression is notlimited to these expressions. Here, X, Y, Z1, and Z2 denote an object(e.g., a device, an element, a circuit, a wiring, an electrode, aterminal, a conductive film, and a layer).

Even when a circuit diagram shows that independent components areelectrically connected to each other, one component has functions of aplurality of components in some cases. For example, when part of awiring also functions as an electrode, one conductive film has functionsof both components: a function of the wiring and a function of theelectrode. Thus, the electrical connection in this specificationincludes in its category such a case where one conductive film hasfunctions of a plurality of components.

REFERENCE NUMERALS

-   ACF1: conductive material, ANO: conductive film, CC: color    conversion layer, CF: absorption layer, CI: control data, CP:    conductive material, C21: capacitor, C22: capacitor, DS: sensing    data, G21: scan line, GCLK: signal, h1: light, h2: light, h3: light,    h4: light, II: input data, N1: node, P1: positional data, PWC1:    signal, PWC2: signal, S21: signal line, SP: control signal, SW21:    switch, SW22: switch, VI: image data, V1: image data, V11: data,    VCOM2: conductive film, 200: data processing device, 210: arithmetic    device, 211: arithmetic portion, 212: memory portion, 213:    artificial intelligence portion, 214: transmission path, 215:    input/output interface, 220: input/output device, 230: display    portion, 231: display region, 233: control circuit, 234:    decompression circuit, 235: image processing circuit, 238: control    portion, 240: input portion, 241: sensing region, 248: control    portion, 250: sensing portion, 290: communication portion, 400:    molecular weight, 501C: insulating film, 501D: insulating film, 504:    conductive film, 506: insulating film, 508: semiconductor film,    508A: region, 508B: region, 508C: region, 510: base material, 512A:    conductive film, 512B: conductive film, 516: insulating film, 518:    insulating film, 519B: terminal, 520: functional layer, 521:    insulating film, 524: conductive film, 528: insulating film, 530:    pixel circuit, 541: bonding layer, 544: terminal, 550: display    element, 551: electrode, 552: electrode, 553: layer, 573: insulating    film, 573A: insulating film, 573B: insulating film, 591A: opening    portion, 650: display element, 700: display panel, 700TP:    input/output panel, 702: pixel, 703: pixel, 705: sealant, 720:    functional layer, 770: base material, 770P: functional film, 771:    insulating film, 775: sensing element, 5200B: data processing    device, 5210: arithmetic device, 5220: input/output device, 5230:    display portion, 5240: input portion, 5250: sensing portion, 5290:    communication portion

This application is based on Japanese Patent Application Serial No.2018-108641 filed with Japan Patent Office on Jun. 6, 2018, the entirecontents of which are hereby incorporated herein by reference.

The invention claimed is:
 1. A display panel comprising: a displayregion, wherein the display region comprises a first pixel, wherein thefirst pixel comprises a first display element, a first color conversionlayer, and a first absorption layer, wherein the first display elementemits first light, wherein the first absorption layer overlaps with thefirst display element, wherein the first absorption layer absorbs thefirst light, wherein the first color conversion layer is sandwichedbetween the first display element and the first absorption layer,wherein the first color conversion layer converts the first light intosecond light and third light, wherein the first color conversion layercomprises two fluorescent substances, wherein the second light has aspectrum comprising a high proportion of light with a long wavelengthcompared with the first light, wherein the first absorption layerabsorbs the third light converted from the first light, wherein thefirst absorption layer absorbs the first light and the third lightincluded in external light, and wherein the third light has a spectrumcomprising a high proportion of light with a long wavelength comparedwith the second light.
 2. The display panel according to claim 1,wherein the first color conversion layer converts the first lightemitted from the first display element into white light.
 3. A displaypanel comprising: a display region, wherein the display region comprisesa first pixel, a second pixel and a third pixel, wherein the first pixelcomprises: a first display element; a first color conversion layer; anda first absorption layer, wherein the first display element emits firstlight, wherein the first absorption layer overlaps with the firstdisplay element, wherein the first absorption layer absorbs the firstlight, wherein the first color conversion layer is sandwiched betweenthe first display element and the first absorption layer, wherein thefirst color conversion layer converts the first light into second light,third light and fourth light, and wherein the second light has aspectrum comprising a high proportion of light with a long wavelengthcompared with the first light, wherein the second pixel comprises: asecond display element; a second color conversion layer; and a secondabsorption layer, wherein the second display element emits the firstlight, wherein the second absorption layer overlaps with the seconddisplay element, wherein the second absorption layer absorbs the firstlight, wherein the second color conversion layer is sandwiched betweenthe second absorption layer and the second display element, and whereinthe second color conversion layer converts the first light into thesecond light, the third light, and the fourth light, wherein the thirdpixel comprises: a third display element; a third color conversionlayer; and a third absorption layer, wherein the third display elementemits the first light, wherein the third absorption layer overlaps withthe third display element, wherein the third absorption layer absorbsthe second light and the third light, wherein the third color conversionlayer is sandwiched between the third absorption layer and the thirddisplay element, and wherein the third color conversion layer convertsthe first light into the second light, the third light, and the fourthlight, wherein the second absorption layer absorbs the second lightconverted from the first light, wherein the second absorption layerabsorbs the first light and the second light included in external light,wherein the third light has a spectrum comprising a high proportion oflight with a long wavelength compared with the second light, and whereinthe fourth light has a spectrum comprising a high proportion of lightwith a short wavelength compared with the second light.
 4. The displaypanel according to claim 3, wherein the second color conversion layerconverts the first light emitted from the second display element intowhite light.
 5. The display panel according to claim 3, wherein thesecond color conversion layer comprises two fluorescent substances. 6.The display panel according to claim 3, wherein the first pixel emitslight of a color that has a chromaticity x of greater than or equal to0.130 and less than or equal to 0.250 and a chromaticity y of greaterthan 0.710 and less than or equal to 0.810 in the CIE 1931 chromaticitycoordinates, wherein the second pixel emits light of a color that has achromaticity x of greater than 0.680 and less than or equal to 0.720 anda chromaticity y of greater than or equal to 0.260 and less than orequal to 0.320 in the CIE 1931 chromaticity coordinates, and wherein thethird pixel emits light of a color that has a chromaticity x of greaterthan or equal to 0.120 and less than or equal to 0.170 and achromaticity y of greater than or equal to 0.020 and less than 0.060 inthe CIE 1931 chromaticity coordinates.
 7. The display panel according toclaim 1, wherein the display region comprises a group of pixels, adifferent group of pixels, a scan line, and a signal line, wherein thegroup of pixels is arranged in a row direction, wherein the group ofpixels comprises the pixel, wherein the different group of pixels isarranged in a column direction intersecting the row direction, whereinthe different group of pixels comprises the pixel, wherein the scan lineis electrically connected to the group of pixels, and wherein the signalline is electrically connected to the different group of pixels.
 8. Thedisplay panel according to claim 7, wherein the display region comprisesa plurality of pixels in a matrix, wherein the display region comprises7600 or more pixels in the row direction, and wherein the display regioncomprises 4300 or more pixels in the column direction.
 9. The displaypanel according to claim 7, wherein a diagonal of the display region isgreater than or equal to 40 inches.
 10. A display device comprising: thedisplay panel according to claim 1, and a control portion, wherein thecontrol portion is supplied with image data and control data, whereinthe control portion generates data on the basis of the image data,wherein the control portion generates a control signal on the basis ofthe control data, wherein the control portion supplies the data and thecontrol signal, wherein the display panel is supplied with the data andthe control signal, and wherein the pixel performs display on the basisof the data.
 11. An input/output device comprising an input portion anda display portion, wherein the display portion comprises the displaypanel according to claim 1, wherein the input portion comprises asensing region, wherein the input portion senses an object approachingthe sensing region, and wherein the sensing region comprises a regionoverlapping with the pixel.
 12. A data processing device comprising: oneor more of a keyboard, a hardware button, a pointing device, a touchsensor, an illuminance sensor, an imaging device, an audio input device,an eye-gaze input device, and an attitude detection device, and thedisplay panel according to claim
 1. 13. A display device comprising: thedisplay panel according to claim 3, and a control portion, wherein thecontrol portion is supplied with image data and control data, whereinthe control portion generates data on the basis of the image data,wherein the control portion generates a control signal on the basis ofthe control data, wherein the control portion supplies the data and thecontrol signal, wherein the display panel is supplied with the data andthe control signal, and wherein the pixel performs display on the basisof the data.
 14. An input/output device comprising an input portion anda display portion, wherein the display portion comprises the displaypanel according to claim 3, wherein the input portion comprises asensing region, wherein the input portion senses an object approachingthe sensing region, and wherein the sensing region comprises a regionoverlapping with the pixel.
 15. A data processing device comprising: oneor more of a keyboard, a hardware button, a pointing device, a touchsensor, an illuminance sensor, an imaging device, an audio input device,an eye-gaze input device, and an attitude detection device, and thedisplay panel according to claim 3.